The baseplates of one-piece and two-piece pouching systems have a hole that you place around your stoma. Since everyone’s stoma is a different size, there are a couple options for getting that hole to be the size you need.
The biggest benefit to cut-to-fit baseplates is that they are fully customizable. The biggest disadvantage is that you have to measure and cut them each time (or eyeball it).
The benefits to moldable technology is that you don’t need scissors and it auto-adjusts to fit your stoma snuggy even if you don’t have it stretched out perfectly. This is also handy if you have a mushroom shaped stoma (larger farther away from your body, smaller at the base) because you can stretch it to fit around the big part and then it will shrink to fit around the base. A nurse advised me not to use this kind of baseplate until my stitches were healed and dissolved, though I’ve heard mixed-comments about this from other nurses. It’s best to get an opinion from your nurse.
The disadvantage to pre-cut baseplates is if your stoma shrinks for any reason, they won’t fit. If you use a pre-cut baseplate, you might want to keep some cut-to-fit or moldable systems on hand, just in case.