2Pcs Bathroom Sink Stopper with Hair Catcher, Pop Up Sink Drain Filter with Removable Stainless Steel Filter Basket Hair Catcher, for US. Drain, for Bathroom Sink Stopper Replacement

whole diameter across top -2.17.  Pop up center is 1.18 in diameter

Circumference at top - 7.75 in.Circumference at neck is -  4.25 in

Simply take the old bathroom sink plug out and insert the new plug too. Cleaning is also a breeze, as you can simply remove the filter basket and rinse it under running water. Use a soft brush or cloth to eliminate any stubborn debris.