Not making any judgements here, but sometimes poor fit doesn't have as much to do with the undies as much as the wearer thinking she's smaller than she actually is.
If your drawers ride up, try going up a size or two. Underwear size isn't always commensurate with trouser size.
If your drawers ride up, try going up a size or two. Underwear size isn't always commensurate with trouser size.