SMALL
External Dimensions: 282mm W x 332mm H
Cut-out Size: 250mm W x 300mm H
Flap Opening Size: 190mm W x 240mm H
MEDIUM
External Dimensions: 316mm W x 405mm H
Cut-out Size: 285mm W x 375mm H
Flap Opening Size: 225mm W x 305mm H
LARGE
External Dimensions: 353mm W x 490mm H
Cut-out Size: 325mm W x 462mm H
Flap Opening Size: 260mm W x 400mm H