Mar 09,  · What size is a boys 14/16 equal in mens size pants? ok hers everything a size 16 can convert to: mens jeans waist (if they have a 26 that will probably fit better, 28 is sometimes a little big) womans jeans:0 or the lenght of a kids 16 is about a depending on the fit of the jeans, so he is probably a 28x30, as long Status: Resolved.