I think they are a bit smaller than the pink/orange Old Navy bags, but about the same size as the other colors at Old Navy. They are a little bit thicker material, however. I was easily able to fit in 2 mugs, 2 coozies, a first aid kit, and several other items to test mine out :-) They won't be big enough for towels, but most of the resorts provide towels at the pool and guests don't need to bring their own.