dd mostly wears girlboxer shape undies. however, even a size up, they don't seem to cover everything they're supposed to (this isn't the most ladylike of girls, you may have guessed) and yes she often chooses to wear cycle shorts under school dresses and skirts.
normal knickers aka "briefs" are generally just too, erm, brief.
Wise mners, tell me where to buy please? we are talking completely averagely sized 8yo.