I haven't seen it but the women in it can't be that much 'all shapes and sizes' if they are wearing H&M clothes which are notoriously small sized and stop at their version of a size 16, which is much smaller than a 14 in Next, Dorothy Perkins or M&S.
There was a twitter thing going round of a 5'10'' size 14 teenage girl, so not overweight, 'wearing' size 16 H&M jeans that went nowhere near doing up.