Baby cards

Two of my colleagues have recently had babies and I made cards to go with the presents we gave them The first one is for English speaking parents and is 6 x 8" to provide enough space for many people to sign:

This one - for German speaking parents - is 4x6" from the outside...

... but a total size for 6x12 when unfolded. The flap with the paper plane can be folded down to reveal more space. If this is still not enough people can still sign around the paper plane.