There are no standard women's sizes. One store's size 4 is probably different from another store's size 4. It's not unbelievable that some would arbitrarily skip the odd numbers too. I have to say, if women collectively demanded that sizes directly correspond to measurements like most men's clothing does, it would save them a lot of hassle.

Not all stores use the even number system. For women's clothing, it depends on the store, either they sell them in even numbers, 2,4,6,8, etc, or odd numbers, 1,3,5,7, etc.

5 is a dress size

Generally, an odd number means to cut for slimmer figures, a lot of juniors clothing is sized that way and even numbers are meant for more curvy figures, usually found in the ladies department. Though there is no norm and sizes can vary greatly. I have a 34 inch waist and can fit in between 11's up to 22's!, depending on the manufacturer, but usually hover around a 16. Knowing your measurements and carrying a tape measurement (or learning a spot on your arm to gauge by) can be a tremendous help when trying to navigate women's fashion.

You realize it's a gift card that can only be used at that store right? Which means it would be useless to a charity.

Actually since its a clothing store that means they can get clothes for people in need. And if they sell accessories like shoes? Even more helpful

it was a fashion designer show at that store. So I doubt you could get many clothes for those in need.

To be sure, even those in need would still be happy to have nice clothing.

She said it was enough for one dress..

Usually they return the payment the way it was paid, cash to cash, credit to credit, debit to debit, gift card to gift card. That's if they have s return policy. Lots of "fancy" stores like this only have exchange or store credit policies.