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All Crochet Hook Sizes in Charts

Crochet Hook Sizing with easy to see size gaps: my size charts (for steel, for medium-range, and for jumbo hooks) include the MISSING sizes.
Download the three charts shown above—with extra columns!—as a free PDF. See below. There was no room for this material in my newsletter issue about crochet hooks. It pairs well with this one: Deluxe Crochet Hook Diagram.

 

Hey there, New Crocheter?: On the face of it, crochet hook sizes are beginner-level stuff. Question one quirky thing and you can end up in a maze. I did. Over the years I’ve had five key realizations. They build on each other in a logical order, below. I wish I could have read this post when I started questioning! Bookmark this if you’re not quite ready for it yet. Better yet, add a comment about where you’re at.

Crochet Hook Sizes Explained

Charts of all crochet hook Sizes! Easy to see size gaps. My size charts (for steel, for medium-range, and for jumbo hooks) include the MISSING sizes.
Vashti’s Charts of Crochet Hook Sizes

First, download my Crochet Hook Size Charts, and then the Deluxe Crochet Hook Diagram. You might want to refer to them as you read further.

I originally created these charts for my own use.The PDF has more information than the three charts pictured at the top of this blog. For example, two more columns, and how to use the charts and understand the size increments. Each chart is a full-page size:

  1. All Steel Crochet Hook Sizes in 0.10 mm increments: 0.40 mm – 3.50 mm
  2. NON-Steel Crochet Hooks, medium-range in 0.25 mm increments: 1.75 mm – 7.75 mm
  3. NON-Steel Crochet Hooks, jumbo sizes in 1.00 mm increments: 8.00 mm – 36.00 mm

Crochet Hook Sizes, the Five Keys

1. I watch exactly where on the hook I make each stitch.

I especially watch the starting loop on the hook because it will become the top two loops of the new stitch. My goal is to avoid forming stitches on the tapered part (“throat”) of the crochet hook.

Some hooks have such a long throat that I can’t avoid making my stitches there. This is a big deal with some stitches. The taper will give my tall stitches loose top loops.

Pictured at right is my first crochet hook (green) and one of my current favorites (gold). My green crochet hook made my stitches look more stringy and uneven than they had to, even for a newer crocheter.

A big revelation for me (thank you Nancy Nehring) was that the crochet hook’s true size is where my stitches are made on it. So the other reason I watch where I make stitches on the hook is to know where to measure the hook size.

2. I treasure my slide gauge tool.

Needle gauges, the kind with holes, are everywhere. They’re even given out for free at yarn shops and conferences. I tossed them all out and only use a slide gauge. If I could find a reliable source for my favorite slide gauge I’d have it in my shop already. Lacis has had this one for a long time. It’s now also at JoAnn Fabrics, Amazon, Walmart, etc. Here’s another one. You can also search for millimeter calipers.

Once I know where on the hook I make my stitches (see #1 above), I measure that with a slide gauge or caliper. I get my true size of each hook in a jiffy. No forcing a hook in or out of the holes of a needle sizer with the risk of scratching the hook in the process!

When I did this with all of my crochet hooks, I found out that about a third of them were not the sizes I thought they were (based on how I use them).

3. I base my stitch gauge on my hook size.

Beginner slip stitch crochet with a big hook!
So stretchy! Easy slip stitch Expedient Cowl.

At some point in my crochet life I realized why we have so many crochet hook sizes. When the stitch gauge is based on the hook size and not on the yarn thickness, or personal habit, some amazing crochet fabrics are possible! Starwirbel, Weightless, stretchy slip stitches, and many more.

There are two more reasons: it’s the way to get the most polished stitching gauge for each project. It also standardizes our results as an international crochet community.

Before this realization I thought the different hook sizes were there to make crocheting with different yarns more pleasant. “I think this yarn is too thick for this hook. Must mean I need a bigger hook size”. That’s a fine reason, but if it were the real reason for the sizes, we’d only need about eight sizes—one per yarn thickness category. See the How Many Crochet Hooks? section of my other crochet hook post.

4. I think in millimeter (mm) sizes.

Instead of the “H hook” of my childhood I now think “5 mm hook”. It has improved every day of my crocheting life. I no longer have to deal with traditional hook size systems that are riddled with overlaps and exceptions.

Not only that, the mm sizing makes it plain where there are gaps in the standard hook sizes, and how large each gap is. This in turn opened up to me a wonderland of in-between or nonstandard crochet hook sizes. Hello handmade crochet hooks, imported hooks, and other collectibles, including odd manufacturing runs of established brands.

5. The actual number of crochet hook sizes? Infinite.

The American Craft Yarn Council (CYC) maintains a chart of 29 steel and 28 non-steel crochet hook sizes according to American and British standards. It’s a good start and includes equivalent mm sizes. I build on it in my crochet hook sizing charts by adding Japanese hook sizes and placeholders for missing sizes.

The millimeter measure accounts for all possible hook sizes, including the sizing standards of other countries. I love seeing how US, UK, and Japanese hook sizes all fit together.

Does an infinite number of crochet hook sizes seem overwhelming? Every crocheter needs a different number of sizes. Check for yourself with my list of five factors.

How Did We Get Here?

I think of the non-metric crochet hook sizing systems as being two great crochet traditions (cotton/silk threads vs. wool yarns) that got mushed together, then sprinkled with sizing standards of different countries. It’s quite the heady brew.

Steel crochet hooks were designed for lace crochet with thread. Steel is very strong for even the finest hook sizes. They’re numbered from 00 to 14 (sometimes 16). The larger the number, the smaller the hook.

Non-steel crochet hooks, whether made of aluminum, wood, bamboo, plastic, or glass, get numbered and lettered sizes (from B to U so far) according to an American system. Sizing systems in other countries use different numbering systems. Unlike the steel sizes, the large the number, the larger the hook.

Let’s talk about the size “G” hook. The CYC lists three non-steel G hooks: 4.0 mm, 4.25 mm, and 4.5 mm. Each one is a useful size. Labeling all of them size “G” is unnecessarily confusing.

The Way of Peace

Just focus on the millimeter size. A crochet hook that measures 4.0 mm (on the part of the hook where you make the stitches) will always be that size for you. It won’t matter what it’s made of, where you live, or which country manufactured the hook. Feels peaceful, doesn’t it?

I’ve added this to an experimental blog post series: Vashti’s How to Crochet Book
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Happy [inter-]National Crochet Month

This is my Crochetville NatCroMo blogging day.

Larger wrap size of DJC Curaçao Wrap in Emerald Deep Lotus yarn
New pineapple crochet lace wrap pattern for Lotus by Doris Chan in Emerald Deep Lotus yarn.

Thanks for stopping by! It’s certainly a big weekend for us crocheters.

Tomorrow is a very green holiday (St. Patrick’s Dayso check out our DesigningVashti Lotus yarn in the new Emerald Deep color. This is a rich, satisfying, inspiring green to take you from winter to spring.

Want to feel warm and cozy quickly? 

I’ve just returned from teaching “Big-Hook Slip Stitch Crochet” in icy Chicago. I urge everyone to gather up their jumbo crochet hooks and super bulky yarns! Some of my slip stitch projects take only an hour or two this way.

Expedient Cowl Took Only Two Hours to Make.

Beginner slip stitch crochet with a big hook!
Cozy Expedient Cowl: Use beginner slip stitches and a big hook. (Add a third ball and more rows for a trendy skirt!)

Warm up a big hook (size P/11.5 or 12 mm) for this toasty, speedy item. I named it “Expedient” because it took me just two hours tops to make one during LAST year’s surprise cold snap.

No super-bulkies handy? Create your own: just crochet with multiple strands held together of whatever’s in your yarn stash.

Tip: throw in at least one strand of alpaca or angora. These fibers are four times warmer than wool. Add a yarn with a halo like mohair, or a textured novelty yarn, to fill in any gaps between stitches.

Set of 5 Big Crochet Hooks: Perfect for NatCroMo

Set of 5 sizes of jumbo wood crochet hooks, and the crocheted "bucket" caddy for them showing the base that's reinforced by crocheting around a recycled plastic ring.
It’s displayed in my studio and I use it all the time now.

Be ready for the next cold snap with this set of five jumbo crochet hooks—sizes Q, R, S, T, and U—bundled with a free Big Hook Bucket pattern. (It’s already at a discount as a kit so I’m unable to discount it further for NatCroMo readers, sorry.) You can buy these crochet hooks individually here.

Armed with these hooks you’ll also be ready for when I release these new Big-Hook Slip Stitch crochet patterns (links currently go to their Ravelry project pages):

Zumie Lace Vest  I used a size S (19 mm) hook for most of it. This one-skein lace item took only 45 minutes to crochet. Yarn: the fun Hikoo Zumie by Skacel.

SS-Luscious Sampler  Size 12 mm (“P”) crochet hook and two skeins of luscious Berroco Noble.

Pink kitty-ears hat with only 95 yds and an M/9 mm hook. It’s simple back loop slip stitch in rows, then seamed on the top and side. It came out smallish on me and perfect on my friend (she kept it!). No yarn left over so I’m mulling a way to get a slightly more out of about 95 yds of yarn for this.

Slip Slab Neckwrap  It was the first prototype for the Expedient Cowl. I needed only 168 yards and a P/12 mm hook.

Also: Happy Spring Break!

Does it start this weekend for your family? My son’s starts this afternoon.

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Deluxe Crochet Hook Diagram: Free Download

Part of the crochet hook diagram I sketched for "Beyond Crochet Hook Debates" issue 71.
I’ve greatly expanded this page since first posting it in 2015, when it was a follow up to newsletter issue 71, “Beyond Crochet Hook Debates”. It’s also now part of an ongoing Crochet Basics series.

 

Thumbnail of Vashti's deluxe crochet hook diagram PDF

At first glance the crochet hook is a very simple tool, so why are there so many different kinds? What makes crocheters fiercely devoted to some and not others? You could make your own crochet hook by carving a notch into the end of a stick or dowel and sanding it smooth. I realized how carefully designed hooks really are when I reshaped a store-bought one.

Please enjoy my deluxe crochet hook diagram and a “hook heat map” from my newsletter (free PDF)Complete Diagram of a Standard Crochet Hook.

Creating a crochet hook diagram also helped me tease out the finer elements that make all the difference between one hook and another. My first sketch grew into a comprehensive map! It brings together terms from several different sources.

How Many Crochet Hooks?

How many crochet hook sizes should there be? How many crochet hooks does a crocheter need? It turns out the answer is different for every crocheter because it depends on about five factors, below.

Consider the yarn you like to crochet with.

Some crocheters are very partial to one or two yarn thicknesses, called weights. Medium or worsted weight is a crowd-pleaser, for example. If you like to crochet with yarn of any weight, from cobweb to roving, you need a few different hook sizes for each of the eight yarn weight categories (#0 Lace to #7 Jumbo)!

How about fiber types?

I’m still surprised sometimes when a crochet hook gets along much better with one yarn than another. If you like to experience the full menu of fibers and fiber blends, from the fuzziest to the slipperiest all spun in different ways, you’re going to need hooks with different head shapes and surface finishes.

  • I really notice this when I crochet with a non-yarn like wire, jewelry cords, and fabric strips.
  • I can pick up a lot of speed with a hook that has a glossy aluminum finish except with very glossy silk yarn. That’s when a brushed matte finish is better.
  • When a fluffy microfiber (synthetic) yarn drags on a giant plastic hook because of static electricity, I switch to a wood hook.
  • When a yarn is dense and round like spaghetti (Jelly Yarn, rayon-wrap cordé, wire, tubing, leather lacing, etc.), a crochet hook with a roomy “bowl”[see diagram] is much better than one with a slit-style bowl.

What kinds of things?

Want to try every possible kind of project, from beaded jewelry to exploded lace to sturdy totes to thick blankets to…so many more kinds of things!? Projects can require very particular crochet hook sizes, styles, and finishes.

Situations, events, and physical conditions.

I have favorite hooks for marathon crocheting (when I have a big crochet deadline to meet). You might like to have a hook set just for traveling like I do; for plane flights I try to avoid metal hooks. Plastic and wood hooks are lighter in my bag, and less quick to slide down between seats to be lost forever.

For those crocheters with hands that are particularly small or large, sensitive to cold, tire easily, are arthritic or in recovery from surgery, and so on, there are crochet hooks specially designed for you. Look for hooks in ergonomic shapes. You can also add your own ergonomic handle with clay, pencil grippers, wrapped fabric, and other materials.

What if you need to crochet in a low- or no-light situation? Light-up hooks, and those that don’t match the color of your yarn are best.

Any special techniques or stitches?

Like to try dramatically different stitches like bullions, split clusters, and picking out that bump loop of single crochets? Tunisian and double-ended crochet? Crochet along the edge of fabric? Cro-tatting? The right crochet hook for the job sure makes a big difference with these.

Loop Picking”: Hooks with a pointier head are very helpful when trying to pick specific loops to crochet into. Camel crochet is a classic case. I usually reach for one when I do Tunisian or slip stitch crochet. Some brands are naturally pointier. I like how easy it is to file the heads of my inexpensive bamboo hooks in different shapes to learn what works best for me.

Beading: I need to have steel crochet hooks of several sizes on hand. You’ll need some with hook heads that are small and streamlined enough to pull a loop of thread or yarn through bead holes. Tulip has done this with their bead crochet hooks.

Tunisian: (Projects can really vary, so I’m going to do a separate post on Tunisian hooks.) Generally I need the length of the hook head to be as short as possible [see diagram], and I need the surface to be frictionless with the particular yarn.

Hard Crochet”: The 1970’s crocheter Mark Dittrick emphasized the difference a large steel hook (size 0 or 1: 2.35–3.25 mm) makes for his ultra tight and stiff sculptural crocheting.

Crochet Hooks as Treasure

Did a family member teach you how to crochet? My mother taught me. I treasure her crochet hooks and the brown moiré jewelry wrap that she used as a hook case.

When you teach a family member, you create a future where your favorite crochet hooks will be cherished!

If you know someone who would like this detailed crochet hook diagram, please be kind and send them to this blog post so that they can download their own copy directly. Right-click this direct link to copy it: https://designingvashti.com/crochet-hook-diagram-free-download. Thanks!

The next post in this series is on the surprisingly rich topic of crochet hook sizing.