There are three pieces that go to this house. The kitchen, Downstairs basement bathroom and the upstairs bathroom. They will insert right where they need to be no shrinking or enlarging just stick them in and enjoy.. Snowy LakeSide Kitchen, Snowy LakeSide 2nd Bath goes in (basment) Snowy LakeSide Upstairs bathroom Please buy these pieces no other bathroom fiter will work but these meshes. Thank you Rose