This is something that frustrates me to no end. How are clothing item sizes not standardized yet?
For example, I recently went to buy new Jeans, so I went to the same store where I got my current Jeans, asked for a size 28, and tried it on. How is it possible that my size 28W Basic Straight Jeans from Fox fit me, while a pair that fits the exact same description is too small?
I later went to a different branch, and there I found another pair which fits the exact same description, and it did fit me!
I have encountered this type of thing inany places, like when buying shoes one of the employees at the store told me "We don't have this in size 42 in stock, but we do have 41 and our sizes are larger".
Imagine if you went to McMaster Carr and asked for an M3 screw, and being told "We are out of M3, but our M2.5 is larger so it should work for you"