Not at all, gorgeous! You will learn to dress in ways that will benefit your shape and all the changes in between. We begin at size 4 and go all of the way up to 26.
In fact, in Boss, you’ll realise that size really is just a number. I always recommend to the Boss Babes to cut off the labels as you will learn to buy your shape, not size! I myself buy oversized shirts so I can tuck them and they flow beautifully.