Boye Crochet Hooks Sizes – Handy Size Chart & All The Sizing Facts

Boye has a large range of crochet hooks, made of many materials and options, in various sizes.

I created this post so you know what sizes are available in each product line of Boye crochet hooks they produce.

Boye Aluminum Crochet Hooks sizes in different colors

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In this post, I’ve provided a handy conversion chart and downloadable PDF for easy reference.

Table Of Contents

Crochet Hook Sizes

First, here’s some information about crochet hook sizing and converting between the different size systems.

There are three main systems, Metric (AUS/NZ), US, and UK/Canada.

For more, visit my post on crochet hook sizes here.

Boye Crochet Hooks Size Chart

Note: This sizing applies to the plastic and Tunisian range.

USUKMetric
B / 1132.25 mm
C / 2112.75 mm
D / 3103.25 mm
E / 43.5 mm
G / 684.25 mm
H / 865.00 mm
I / 955.25 mm
J / 1045.75 mm
K / 10.536.50 mm
N / 1500010.00 mm
P / 1611.50 mm
Q16.00 mm
S19.00 mm
Plastic Afghan Size Chart

Get A Handy PDF Of This Chart

Aluminum Crochet Hooks Sizes Boye

Here is a sizing guide for Boye aluminum crochet hooks. Note: This also applies to the ergonomic range.

USUKMetric
B / 1132.25 mm
C / 2112.75 mm
D / 3103.25 mm
E / 43.5 mm
G / 684.25 mm
H / 865.00 mm
I / 955.25 mm
J / 1045.75 mm
K / 10.536.50 mm
N / 1500010.00 mm
P / 1611.50 mm
Q16.00 mm
S19.00 mm
Aluminum Size Chart

Get A Handy PDF Of This Chart

Ergonomic Size Chart

Get A Handy PDF Of This Chart

Red Boye Crochet Hooks Sizes

The red Boye crochet hook is size F in US Sizing or 4.00mm in Metric sizing.

Boye Steel Crochet Hook Size Chart

Steel crochet hooks are smaller and finer, used for crocheting intricate designs or lace with crochet thread.

MetricUS
3.50 mm00
3.25 mm0
2.75 mm1
2.55 mm0
2.25 mm2
2.10 mm3
2 mm4
1.90 mm5
1.80 mm6
1.65 mm7
1.50 mm8/7/2
1.40 mm9/8
1.30 mm10
1.10 mm11
1 mm12/6
0.85 mm13
0.75 mm14/10
Steel Crochet Hooks Size Chart

Get A Handy PDF Of This Chart

Hopefully, you found this helpful. Boye crochet hooks are excellent for beginners due to their affordability, lightweight and comfortable feel, and wide availability.

Do you use Boye hooks? If so, what do you like about them? I’d be interested to hear your thoughts.

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About Jodie Morgan

Hi. I’m Jodie Morgan, owner and creator of Crochet Penguin. (Yes, I’m real :) )

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25 thoughts on “Boye Crochet Hooks Sizes – Handy Size Chart & All The Sizing Facts”

  1. I have the boye ergonomic set but I think a couple are missing or mislabeled or something because I have a 4.25 mm and a 3.75 mm but I don’t have a four. They’re not have a 5.25 mm and a 5.75 mm but I don’t have a five or a six then I have a 6.5 mmso I think they are either mislabeled or I am missing three out of the set I bought because I don’t find that correctly on the conversion chart. If you could tell me the correct conversions I would greatly appreciate it.

    Reply
    • Hi Charity. Can you please send me a link of the set you purchased. I have seen other crocheters comment that the sizing of some sets are not labelled correctly. Cheers Jodie.

      Reply
        • Hi Bobie

          Thanks for your comment. Can you let me know what sizes you are referring to that you’ve noticed have changed?

          I always want to have up to date information for my readers and appreciate your help.

          Cheers

          Jodie

          Reply
    • Hi Lisa. Thanks for you message. I will work on that. I’d recommend getting a needle/hook gauge and then you can be sure that you know which size hook you are using. Cheers Jodie

      Reply
    • Hi Carla. I’d highly recommend getting a needle/hook gauge to double check the size of your hook or use a measuring tape and measure the diameter. Line up the edge of the hook with beginning of the long bar of the metric sizing. So start off at the 2cm mark. Then count how many smaller bars there are (they are each a mm) to the other edge of your hook. This won’t be exact but it will be very close to what the diameter of your hook is in mm. Cheers Jodie

      Reply
  2. Jodie
    I have a Boye crochet hook that is labeled J/10-5.75 mm but I don’t see it on any of the charts that are posted here. Does that mean that this hook is missed labeled?

    Reply
    • Hi Kathleen. I’ve done some research and I’ve found a listing that identifies the Boye Hook as J/5.75mm. I’ve read that hooks can be mislabeled. The best way to check the size of your hook is to use a crochet hook/knitting needle gauge. If there is a little room left when you place it in the 6mm hole, then you would assume it is 5.75mm. If it fits perfectly then it is 6mm. Hope that helps.

      Reply
  3. I have an old light green Boye hook that is at least 45 yrs old if I’m counting my age right & it had this listed on it… U. S. A. F 45¢, I can’t find what mm it is on any of the charts could you tell me please? I know it’s gotta be 3 – 3.? but I’m not sure.
    Thank you so much,
    Beth

    Reply
        • Hi Beth. I’ve done a little research but haven’t found what size your vintage hook is. Do you have a hook/needle gauge that you could try in the different holes to see what mm it is? If not, an estimate is to put the hook on a tape measure with millimeter markings and see how many bars the width of the hook takes up. Cheers Jodie

          Reply
  4. Hi Jodie! I have a boye plastic crochet hook that is light grey/blue and is labeled S 19-19.00mm. I picked it up on a clearance sale at Walmart nearly 10 years ago.

    Reply
    • Thanks for sharing Sara. I will update my post reflecting this size. I’ve done some research and see that some stores still stock this hook. Thanks for your help. Cheers Jodie

      Reply
  5. I have green ergonomic D hook that came in a set I bought at Walmart that is labeled 3.125mm. This has really thrown me off. I am glad to read that they can frequently be miss labeled. So I am then assuming it meant 3.25mm.

    Reply
  6. Hello, I have been a Boye user for more than 40 years and the H-5 mm was my standby. However my collection has a gold, 9.0mm labeled N. I have moved into larger bulky yarn and am trying to get custom hooks with Boye heads so I’m trying to find out the larger sizing. Any help would be appreciated.

    Reply
    • Hi Sugar. Thanks for getting in touch. Do you have a preferred larger bulky yarn? Often on the label of the yarn it will say what hook size to use with that yarn. On the Craft Yarn Council chart the range of hook sizes for bulky yarn is 6.5mm to 9.0mm. Super bulky 9.0mm – 15.0mm. If you are getting custom hooks with Boye Heads hopefully they could make you say a 10.0mm, 10.5mm. Hope this helps. Cheers Jodie

      Reply
    • Hi Lisa. Thanks for getting in touch. It may take a bit of research online at different stores. What ones in particular are you trying to find? Cheers Jodie

      Reply
  7. I am so confused!! I don’t know if I’m reading English or Spanish on these numbers sizes letters. Why can’t it be all just one number or all just one letter?
    I’m being told to start with a 5.5 then change to a 6!
    I’m assuming H is a 5 and 6 is an I. Is that anywhere correct? Lol

    Reply
    • Hi Rachel. Your confusion is understandable. I assume the 5.5 and 6 refer to the metric sizing, so 5.5mm and 6.0mm. Many crocheters prefer the millimeter sizing because brands can differ with their corresponding letter. The closest Boye sizes are I at 5.25mm and J 5.75mm. Using hooks slightly larger or smaller will change the size of your stitches but also how tight you crochet will affect the size of your stitches. I always recommend doing a swatch with a new pattern to see if the sizes of hooks you are being told to use, matches what the pattern gauge is.

      Reply
  8. Hi Jodie,
    I have a Boye J hook (gold in color) around 50 years old. I have tried to get more Boye J hooks, but they are not the same in size, color, or labeling… the only thing that is the same is the letter J on them. My old one is simply labeled without the metric measurement. One side is merely labeled “Boye” the other side is labeled “SIZE J USA.” For example, the last J hook I got is blue. As the old gold hook, this one is labeled one side “Boye,” however, the other side is labeled “J/10-5.75MM” and the top is much more narrow. Is there any way to get a J hook the same size as my old one?

    Reply
    • Hi Denine. Thanks for getting in touch. I understand your desire to find a hook that is the same as your Boye J Hook. What I’d suggest is searching online platforms like Ebay or Etsy. Some sellers have vintage hooks but it is so hard to know if you’d find an exact one like your 50 year old one. Here is an Etsy seller that specializes in vintage hooks. Take a look at her listings. Perhaps you might find the one you are looking for. I hope so. https://crochetpenguin.com/recommends/divintage-blessings-etsy-store-2/ Cheers Jodie

      Reply

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