Mine are M and S big girl knickers and even bigger since stoma operation to stuff it into! You can buy very expensive fancy stoma briefs with pouches to stick your pouch in and fancy covers but I find big knickers easier and cheaper. And even with a fancy cover on , it is what it is - a bag of **** on your belly.
Today I am sporting a baggy black jumper, grey pinafore thing, tights and sparkly silver converse type things - oh and a huge purple stripey chemo beanie that a friend knitted- you wouldn't miss me in street xx