I make my BB 4 inches wide by however long you need them to be. You really do not need a pattern per se for these. I add 2 inches to each side for the velcro.. so a 8 inch waist of the dog would be 8, plus 2, plus 2 =12 inch long. Sew the velco at one end, then flip the bb over to place the other velcro at the other end, so the velcro is on differing sides of the BB. I make 2 styles of BB, thick flannel or straps inside to hold pantiliners.
Hope this is what you needed.
