The bund hides the mudflap anchor point, so maybe beneath your jumpsuit's elastic, and it's as wide as the wearer's butt (no exact Dim as everybody isn't the same proportion). On the riding patches, You can pattern them off of a pair of existing pants, you can do it in 4 pieces (R/L Front/back). For the Straps they shouldn't have a lot of slack in them it should be pretty close to the leg.