We've always bought knickers from either M&S or the supermarkets and up to now they've been fine. But they seem to have changed the cut and the latest batch aren't wide enough across the crotch and sit too high at the back. DD is 6 1/2 and spends her whole time yanking her pants out of her bum.
We've tried the "shorts" style and they are slightly better but still don't cover the cheeks. It's driving us both mad. Has anybody found comfortable, well fitting, covering children's pants anywhere?