Are they sack like and unflattering for a size 10-12? I have recently discovered that my midlife tummy bulge is mostly due to fibroids. Waiting for surgery, but in the meantime I find tight clothes or waistbands very uncomfortable. Need some cheap, loose outfits that work until I am fixed. Kit and Caboodle seem loose and comfy, but the one-size-fits all makes me wary.