Does anyone here know the exact dimensions of overhead bins for CX? I'm looking to buy a 22"T X 20"W X 10"D garment bag. I'm CX DM. I don't expect to have a problem with security...only the fact that it actually may not fit on the plane. Any ideas?

For reference purposes, a regular carry-on is either 20" or 22" Tall X 14"X Wide X 10" or 12" Deep.