Don’t know your size? A good rule when choosing a Zilker Belt is to go 2″ larger than your pants' waist size. So if you typically wear size 34 jeans, order a size 36 belt. For odd sizes, we suggest ordering 3″ larger to be safe (ex. – choose a size 38 Zilker Belt for size 35 jeans). Check out our Size Charts below for more details.