What a semi-custom faja means? Semi-custom fajas are a novelty way to buy a faja by size. You can get our top sold model fajas with different sizes for your waist and hips. Perfect for girls with BBL that are looking for a shipper and faster delivery option. For instance, you can buy an XS faja on the waist and an XL on the hips. (No worries, we always will make Full customize fajas) Note: It has a front opening with a fabric flap on the crotch area to cover your vagina, it's standard size and this will allow you to urinate only. If you want your crotch area fully open, you will have to alter it on your own once you receive it.