Is there a size O Crochet Hook?

I’m trying to make the Bubbles Baby Blanket using the size N hook and two strands of worsted yarn. My work is too tight and the blanket is turning out too small and dense. I took it apart last night. I cannot seem to find the next size hook, which would be O. I have a P but it is much larger than the N.

Is there such a thing as a size O hook? I could not find one online. Would sizing down in the yarn help, maybe sport weight? I bought all this yarn in worsted.

Here’s the pattern:

It doesn’t appear there is; the sets I checked out jumped from N to P and I believe I didn’t find one when I was looking for a larger one. Two strands of sport would about equal worsted weight, so that may be too thin. You could try 3 strands of the sport and see if that works. Or one of worsted and one of sport.

My first thought was similar to Sue’s but for a different reason. Often zero and oh are confused with each other. I though there was a steel crochet hook size zero ‘0’ (or “aught”) for thread size #5 to #10.

I found a size O listed on this metric to USA conversion chart:

Hook size O US is 10.00 mm.

That is just a touch larger than 3/8 inch (between 25/64" and 13/32")

But at this older chart, US letter O sized hook is said to be 12 mm and Addi was listed as the only source.

But if you don’t have a size O and need to reach a larger gauge for a more flexible fabric, could you try using a looser tension?

Using smaller weight yarn with the same hook size would help make it softer and more flexible in drape. I noted that the pattern gave the pattern as multiple of 3 + 2 so if a starting chain of 62 is not wide enough for your needs, you can add a multiple of 3 stitches to the starting chain.

Thanks to you both. The idea of working looser is good in theory, but it doesn’t really work.

I could see if I have some sport wt. in the stash and use one worsted and one sport. I’ll try a swatch of that. Size P hooks are just way too big.


I got a size O hook from Annie’s Attic. You might try Herrschners or Patternworks. Good luck as I only got it by accident as I was looking for something else at the time.

I went to Michaels on the off chance that they had an “O” and they did not, of course. But I was looking at the Boye size P hook, and it looked small to me. So I brought it home to compare with my Lion P, and it IS smaller.

Lion Brand P is 11.50 mm. It won’t even fit in my needle sizer thingie.

Boye P is 10.0 mm

So I got the Boye and maybe it will work as an “O.”

THEN–I was looking at the Boye N hook I used to start the baby blanket, and I inserted it into the N slot in the Susan Bates needle sizer, and it was so big. It actually fit in the “L” slot. I’m just amazed at what I’m seeing here. Why does an N hook fit in the L slot of the sizer???

Sorry if I have bored and confused anyone…or maybe I’m just confused.

Either the L was mislabeled or Lion uses its own sizing system that isn’t standard. I’ve never used their hooks or needles, just Boye or Susan Bates.

Well, different manufacturers apply the standard US sizes with different tolerance. What Wheat Wrote is a blog by Wheat Carr and she has at least one post lamenting the loose measurement tolerances used by different manufacturers.

Aside from that there is also a difference in style between Bates and Boye. Boye hooks tend to have a smaller, more pointed head of the hook with a tapered neck and longer barrel (to the thumb tab). Bates maintains barrel size all the way to the head of the hook which is less pointed and the slot that is cut into full diameter neck of the hook.

Here is a link to a site that discusses hooks and their differences by manufacturer.

Here is an image that shows a side by side view of Bates and Boye hooks of the "same size."

The size of a hook is determined by the diameter of the shaft and not the head of the hook. :thumbsup:

I personally prefer the longer shaft of the Boye hooks and feel that Susan Bates is trying to give me the short shaft. :wink:

But the difference she noted was in the Lion brand hooks. What do you have to say about them…?

Or “A disaster in the making!”


Well, what would you expect when…

[size=5]Boye Bates Lion[/size]
:slight_smile: [/COLOR]

There is a size 0 and double 0 in steel crochet hooks by both Boye and Susan Bates.

However, I have not seen a size 0 in the plastic or aluminum crochet hooks. Sorry, just checked my bone ones but the numbers or letters do not go that high in my set.

Not zero 0, but the letter O.

Well, the difficulty posed is of zero and ‘Oh’ being easily confused in print, and thus often avoided. Building planners/designers avoid using 13 for a floor number. Similar reasoning could be why I have only seen size P hooks.

Found a chart here::

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Crochet hooks are pretty standard in size until you get to the K size. After that, sizing is different depending on the brand. Boye crochet hooks and Susan Bates are different. Still no O size, but I go by the mm. I wanted then in metal, but they only make these in acrylics. I prefer Susan Bates metal hooks because they are inline hooks, straight all along the length like a pencil. Boye has a slight curve at the hook, which means that you are twisting your wrist more. You can possibly get carpal tunnel. I can crochet longer with Susan Bates. Be aware that if you buy a N hook at a thrift store, the old ones may be different. I bought an N that was a 10mm when the new ones were a 9. You can use a knitting needle gauge to size crochet hooks. They have a section for that on the Susan Bates gauges. image

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