It fits the sizer. Although I had a nasty SWISS agent who insisted it would not fit in their equivalent-sized sizer (and refused to try it) or in the overheads, and forced me to check it in. This was apparently his way of "punishing" me for boarding with *Gs as a UA1K, which he did not recognize as *G, and got mad at me when I showed him the physical card that has *G printed on it.