What size wrench to use with your Bolts

This ia always a fun question.  You know the bolt size, but forgot what size socket or wrench you need.  Here is your answer.

Bolt Diameter (mm)	Head/Wrench Size (mm)
	ANSI/ISO	DIN	JIS	DIN/ISO Heavy Hex
4	7	7	7	-
5	8	8	8	-
6	10	10	10	-
7	-	11	-	-
8	13	13	12	-
10	16	17	14	-
12	18	19	17	22/21*
14	21	22	19	-
16	24	24	22	27
18	-	27	-	-
20	30	30	-	34/32*
ANSI - American National Standards Institute ISO - International Organization for Standardisation DIN - Deutsches Institut fur Normung JIS - Japanese Industrial Standard * Indicates ISO standard.