I am trying to decide between two old military kilts. One is a size 14, 30" waist, 25" total length, for height 5'7"-5'8". The other is a size 20, 31" waist, 26" total length, for height 5'9"-5'10". The one with the 30" waist is about $20 less than the other. As I am 5'7" with a 31 1/2 natural waist, which one would I be better off with?