Wandrd Zip 21L

Hi, I’m considering a zip 21L as the stated sizes say it’s 40x28x14.5cm which afaik makes it the only “premium” camera bag on the market that will fit under the seat of an airline that only allows 40x30x15cm.

Can anyone confirm whether the 14.5cm stated depth is the total, overall size including the straps, or is it only referring to the bag itself?

I’d need it to fit in a strict 40x30x15 airport bag sizer.