The Importance of a Conjunction

I wonder why so many of the "Big and Tall" sections of stores are really "Big or Tall" sections? Is it so difficult to contemplate someone being 190cm tall (about 6'3") and also broad around the middle (about 135 kg/300 lbs)?

This observation brought to you by the unfortunate fact that I gained between ten and fifteen pounds over the December-January period when I was in Columbus most of the time working 12-plus-hour days, and taking that weight off has proven much more difficult than putting in on was; therefore, I'm going to have to get a few larger bits of clothing, although I hope it's merely a temporary measure. I gave away all of my size-46 slacks a couple of years ago precisely to give myself a dis-incentive to gaining weight like that.