Multi way infinity dress

Just bought this, is supposed to be one size up to 18 but I am a 14/16 and it is way too small. Would be perfect for someone size 6/8/10. I will provide you with a printout of the 72 ways you can wear this dress and the free bandeau I got with it. I used the website image because it looks like a bunch of fabric until you try it on and unfortunatley for me it's too small so I can't model it. It makes a great travel dress since it's a stretch jersey. I have the black colour.