I was shopping for a dress the other day and found one that I liked. It wasn't technically a dress but rather a top and skirt sold together where you have to get the same size in the top and the skirt.
I get two of them (size A and size B) and take them to the fitting room. I start with size A, the smaller size. The skirt fits fine, but the top is too small. So I try on size B. This top fits nicely, but the zipper on the skirt is broken, and I can't buy that one. I went back to the rack to see if there was another size B. There wasn't.
So I had two options. Option 1 is that I could explain the situation to someone who works there and see if they'll allow me to buy the skirt from the size A set and the top from the size B set. The downside is that there's always the chance that the clerk will be so determined to follow the rules and not allow mixing that she won't let me do that, regardless of the fact that they're going to have to discard one complete set (or mark it down really low) due to the broken zipper. Mind you, this was an originally $85 dress on clearance for $25, so I don't know how much lower they could take it.
The second option would be to mix them on my own and not feel guilty since I know that they can't sell the size B skirt anyway. The dresses are on clearance and are precariously close to not being sold at all, based on how much they've had to mark them off, so I'd actually be doing a good thing by helping them sell one of the outfits. The downside, of course, is that it is against the rules, and I would feel guilty.
So what you you do?
BTW, I took an unlisted third option. They did have the dress in size C, one size bigger than size B. I tried it on, and it fit fine, so I bought that one. It's black and cut really well, so you don't really notice that it's a bit too big for me. I bought it specifically to wear to funerals, so I really hope the skirt doesn't fall off at an inopportune moment.

I get two of them (size A and size B) and take them to the fitting room. I start with size A, the smaller size. The skirt fits fine, but the top is too small. So I try on size B. This top fits nicely, but the zipper on the skirt is broken, and I can't buy that one. I went back to the rack to see if there was another size B. There wasn't.
So I had two options. Option 1 is that I could explain the situation to someone who works there and see if they'll allow me to buy the skirt from the size A set and the top from the size B set. The downside is that there's always the chance that the clerk will be so determined to follow the rules and not allow mixing that she won't let me do that, regardless of the fact that they're going to have to discard one complete set (or mark it down really low) due to the broken zipper. Mind you, this was an originally $85 dress on clearance for $25, so I don't know how much lower they could take it.
The second option would be to mix them on my own and not feel guilty since I know that they can't sell the size B skirt anyway. The dresses are on clearance and are precariously close to not being sold at all, based on how much they've had to mark them off, so I'd actually be doing a good thing by helping them sell one of the outfits. The downside, of course, is that it is against the rules, and I would feel guilty.
So what you you do?
BTW, I took an unlisted third option. They did have the dress in size C, one size bigger than size B. I tried it on, and it fit fine, so I bought that one. It's black and cut really well, so you don't really notice that it's a bit too big for me. I bought it specifically to wear to funerals, so I really hope the skirt doesn't fall off at an inopportune moment.


Of course, your solution worked even better, Kermit. Enjoy your new outfit! 
