The blue cage folds completely flat to fit into the envelope and there is a large tag upon which to write your greeting. Fold the two pieces flat and slip in the envelope for a magical surprise when it's opened.This card features a large blank laser cut tag for your own special message and a luxury envelope.Card size is 155mm x 155m when folded flat. That's UK letter rate for postage in the 165mm x 165mm luxury envelope provided.