Sizing Table

for Knitting Needles and Crochet Hooks

1. Bates and Boye knitting needle sizes are almost identical down the chart.
2. Both Boye and Bates size increments are based on 1/4 millimeter or 10/1,000ths of an inch
   (a postcard is about 7/1,000ths of an inch)
3. Boye and Bates each use a different measuring scale for their crochet hooks.
4. Boye crochet hooks do not always accurately match the metric size stated on the package.
   (Noted in columns 5 & 6)
5. Wood expands and contracts with humidity changes, so sizes will slightly vary. These changes are proportional to the thickness and will not noticeably affect the size of stitch.

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NOTE 3/13/2014: When I originally set up this table (many years ago), I measured the sizes of knitting needles with a micrometer. I have been making the knittng needles accurately to those sizes ever since.
Sometime in the interum, both Boye and Bates changed a few of the sizes to eliminate the 1/4mm jumps in needles above size 5. A quarter millimeter is the same as 1/100 of an inch
I just completed dowel for the shafts in the new sizes 6, 9 and 10. They are marked as "new" in the chart. Unless a customer specifically requests the "old" sizes, I will send the new sizes.
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An asterisk (*) denotes sizes stocked by Turn of the Century (we'll do our best anyway!)

MM	INCH	KNITTING NEEDLES Bates & Boye	BATES	BOYE Crochet hooks (accurate shaft measurement)	BOYE Crochet hooks (as stated on the package)	RED HEART	YARN BEE
2.75	0.108	2.0	C	D
3.00	0.118
3.25	0.128	3.0	D	E	D-3
3.50	0.138	4.0	E		E-4
3.75	0.147	5.0	F	F *	F-5
4.00	0.158	new 6 *				G-5
4.25	0.167	old 6.0 *	G		G-6		G-6
4.50	0.177	7.0 *		G *
4.75	0.187
5.00	0.197	8.0 *	H	H *	H-8	H-8	H-8
5.25	0.206	old 9 *
5.50	0.216	new 9 *	I		I-9		I-9
5.75	0.226	old 10 *	J	I *
6.00	0.236	new 10 *			J-10		J-10
6.25	0.246			J *
6.50	0.256	10.5 *	K		K-10.5	K-10.5
6.75	0.266
7.00	0.276	*		K *
8.00	0.315	11.0 *	L	N *		L-11	L-11
9.00	0.354	13.0 *	M	9mm *	N	M-13	M-13
10.00	0.394	15.0 *	N	P *	P	N-15	N-15
11.50	0.453	16.0 *	P			P-16	P-16
12.50	0.492	17.0 *
13.00	0.513			13mm *
15.75	0.620			Q *	Q
16.00	0.630	19.0 *	Q
19.00	0.768		S	S *	S
25.00	0.984		U	U *	U

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