do these run wide? My grand daughter has a very wide foot.

No, do not run wide. The are true to size - standard. However, they are made to stretch and flex. The rubber around the foot has to be tight, to stay on while swimming. They are generally more difficult to get on, but excellent at staying on.

How do the sizes translate to actual shoe sizes?

These run small. I always buy a 39 or 40 in Euro sizes, but these -- 36 - 42 Euro -- are too small. Had to return them and get the next larger size.

Why do these come covered in slimy stuff?

That will come off once you use it the first time or you can wash them off with some liquid detergent. It is a coating the fins come with to keep them from drying out and to keep their bright colors to look good for retail sales. It will not interfere with its wear. Lynn from Swim Zone Inc.

Hi my son is 10 years old and he used shoes size 7. Which size will be?

If you are talking about a size 7 in mens shoes, which is like an 8 or so in women's shoes, then get the L MEN 7-9. (Does he has fairly large feet for his age?) I wear a size 8-8.5 in women's shoes and got the Large size fins. They fit correctly. Plus buying a size a little too big is MUCH better than too small, because his feet will grow!

Age Range (Description)	Adult
Product Dimensions	20.98"L x 10.98"W
Global Trade Identification Number	00616323200784
Manufacturer	FINIS
UPC	616323200784
Item Package Dimensions L x W x H	15.04 x 9.84 x 2.17 inches
Package Weight	0.45 Kilograms
Item Dimensions LxWxH	20.98 x 10.98 x 2.01 inches
Item Weight	0.98 Pounds
Brand Name	FINIS
Warranty Description	30 Day Limited
Model Name	Finis Youth Floating Fins, Blue/Orange - XX-Small
Suggested Users	""
Number of Items	1
Part Number	1.05.037.02
Model Year	2015
Style	Blue/Orange
Included Components	Finis Youth Floating Fins, Blue/Orange - XX-Small
Size	XXS (Jr. 11-1)

Long Floating Fins , Blue/Orange, XXS (Jr. 11-1) (1.05.037.02)

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