The UGB measures 22.5" x 11.5" x 12"; and unfolds to garment bag measuring 39.5" x 33"; 2.5" when folded flat.
The UGB is within the overhead-locker guidelines for most premium and international airlines. It is designed to be carry-on friendly, but cabin size rules do vary between airlines and ticket types, so we always recommend checking your airline’s specific allowance before you travel.

