Polyresin Toilet Seat Sea Fish Ajustable Elongated Hinge | Renovator's Supply Toilet Seats for every bathroom. Choose your Toilet Seats here today. Fun toilet seats made of High Grade Polymer for durability. Does NOT yellow like most polymers Seat 16 7/8 x 14 1/2 Lid 16 1/8 x 13 3/8 inch Oval hinges fit standard 5 1/2 in. hole spacing Adjustable but not recommended for adjusting on standard US toilets