Contrary to popular belief, taller and larger people do not usually need wider pads than the more petite. According to this article (and the research that I conducted in my local underwear department), standard crotch width for almost any size underwear is 2.5 - 2.75 inches, but there is variation in styles. Bikinis and hipsters usually run narrower than high cuts and briefs.

Size does make a difference in the length of the pad - particularly in the crotch length, which is the narrowest part.

The pieces on the right are cut with longer crotches.