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How big a cake for 20 party bags?

(2 Posts)
CardinalCrow Tue 26-Sep-17 13:15:55

Ordering a birthday cake for DD, who's having a birthday party with about 20 kids. There'll be the inevitable party bags with pieces of cake. I know this is possibly a "how long's a piece of string?" question, but roughly what diameter of birthday cake would I need to get 20 non-skimpy pieces out of it?

OP’s posts: |
CardinalCrow Tue 26-Sep-17 13:16:37

(And if there's enough for a piece left over for her mum and dad, that'd be great blush)

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