What is your waist size if you wear a size 13 in jeans?

If you wear a size 13 in jeans, roughly your waist size will be anywhere between a 31½ to a 33. A size 13 in jeans almost means that your hip size in generally in between a 43 to 44½. Some jean designs have different makes to them so always make sure to try jeans on before you buy them.