For brands like Sven, Naot, Finn Comfort, Sanita, Spring Step, Woplky, MBT, Arcopedico, Arche, Spira, Taryn Rose, Cozy Goose, Mephisto, Ecco and Beautifeel, use European sizing. For brands like Stegmen, Simple, UGG, Emu, and Ulu, use American sizing. Acorn has a seperate grid because their size range contains XXS and XL.

	Narrow	Medium	Regular
A size 35 fits Woman's size 4 1/2 to 5	35 NAR	35 MED	35 REG
A size 36 fits Women's size 5 1/2 to 6	36 NAR	36 MED	36 REG
A size 37 fits Women's size 6 1/2 to 7	37 NAR	37 MED	37 REG
A size 38 fits Women's size 7 1/2 to 8 and Men's 5 to 5 1/2	38 NAR	38 MED	38 REG
A size 39 fits Women's size 8 1/2 to 9 and Men's 6 to 6 1/2	39 NAR	39 MED	39 REG
A size 40 fits Women's size 9 1/2 to 10 and Men's 7 to 7 1/2	40 NAR	40 MED	40 REG
A size 41 fits Women's size 10 1/2 to 11 and Men's 8 to 8 1/2	41 NAR	41 MED	41 REG
A size 42 fits Women's size 11 1/2 to 12 and Men's 9 to 9 1/2	42 NAR	42 MED	42 REG
A size 43 fits Women's size 12 1/2 to 13 and Men's 10 to 10 1/2	43 NAR	43 MED	43 REG
A size 44 fits Women's size 13 1/2 to 14 and Men's 11 to 11 1/2	44 NAR	44 MED	44 REG
A size 45 fits Men's 12 to 12 1/2	45 NAR	45 MED	45 REG
A size 46 fits Men's 13 to 13 1/2	46 NAR	46 MED	46 REG
A size 47 fits Men's 14 to 14 1/2	47 NAR	47 MED	47 REG
A size 48 fits Men's 15 to 15 1/2	48 NAR	48 MED	48 REG
A size 49 fits Men's 16 to 16 1/2	49 NAR	49 MED	49 REG
A size 50 fits Men's 17 to 17 1/2	50 NAR	50 MED	50 REG

 

 

 

Women's American Sizing
3
3 1/2
4
4 1/2
5
5 1/2
6
6 1/2
7
7 1/2
8
8 1/2
9
9 1/2
10
10 1/2
11
11 1/2
12
12 1/2
13

Men's American Sizing
5
5 1/2
6
6 1/2
7
7 1/2
8
8 1/2
9
9 1/2
10
10 1/2
11
11 1/2
12
12 1/2
13

Acorn
Size	Woman's	Men's
XXS	5 1/2 - 7	——
XS	7 1/2 - 8 1/2	6 -7
S	9 -10	7 1/2 - 8 1/2
M	10 1/2 - 11	9 -10
L	——	10 1/2 - 11 1/2
XL	——	12 -13

Acorn Slippers / Outdoor
Woman's	Men's
5	7
6	8
7	9
8	10
9	11
10	12
	13