This very snug box has interior dimensions of 14" tall, 14" across the bottom, and 5" front to back. Inspection door is on top of the "toe".Entrance hole is 2.5" Works great for Pyrrhura conures, canary wings, scarlet chests, etc.
Left or Right mounted boxes are determined by which side of your habitat the box will be mounted if you are standing in front, facing the habitat.