Speedo Fins Size Chart

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Speedo Switchblade Fins Sizing Information

Size	Kids'	Women's	Men's
XXXS	1 - 1.5	-	-
XXS	2 - 3	3 - 4	-
XS	4 - 5	5 - 6	-
S	6 - 7	7 - 8	5 - 6
M	-	9 - 10	7 - 8
L	-	11 - 12	9 - 10
XL	-	13 - 14	11 - 12
XXL	-	14 - 15	13 - 14

Speedo Trialon Fins Size Chart

Size	Kids'	Women's	Men's	Length (end of toe to end of heel)
XXXS	11-13	-	-	7.5 in
XXS	1-3	-	-	8 in
XS	3-4	4-5	-	8.7
S	-	6-7	5-6	8.9 in
M	-	8-9	7-8	9.4 in
L	-	9-10	8-9	10 in
XL	-	11/12	10-11	10.5 in
XXL	-	13-14	12-13	10.9 in

*Fins should have a snug fit. If you are in between measurements we recommend sizing down.