Like everywhere, tastes vary, but judging from conversations with Dominican friends, slim legs that would be considered attractive in Europe are considered much too skinny in the DR. They like chunky legs.
Also, based on a fashion shoots in local papers and magazines, you very rarely see any model nearly as thin as their European/North American equivalents. Many models look like healthy UK size 12s (US 8).
Matilda is right. The UK concept of "does my bum look big in this" does not exist in the DR.