Cancelling parts of a rather over the top Next order

^!£$&

I dont see what the problem is with ordering two sizes of the same item i did this with the next sale simply because their sizing does vary on some garments so i want the best fit possible. I plan on returning at least 1/3rd of my order due to this how is this wrong? If your ordering clothes over the internet how will you know what fits until you try it on? Some people should just get off their high horses me thinks!