Red Game Bibs Overalls When a customer is at the high end of the waist range we recommend purchasing the next size larger for your ultimate comfort A customers waist size in bib overalls will typically be about 2-4 inches bigger than your waist size in jeans, especially if your belly hangs over your waist line To determine the most accurate bib overall fit for female customers, the general rule of thumb is to add 23 inches to the customers size (eg: Size 6 = 29" waist)