This is a costume that is in one piece, everything sewn together, with one entry area, usually in the rear. It's usually harder to take care of. Replacement of pieces usually means removal of the seams holding them on.

In this case, you will have to add on extras if attached feet and paws. Otherwise they will be too short. If you only make it to fit yourself, then consider what happens when you sell it to someone else who is bigger than you. You will have to inform the potential buyers of this.