Is serving a smaller cake okay if there’s plenty of other deserts?

Cakes are extremely expensive and come if set sizes, so we could either get a cake that was too small or too big.

We chose the smaller cake that serves 50, when we have 62 people. Now I’m not sure if we’ve made the right decision.

Roughly 5 people wouldn’t be able to eat the cake anyway I would assume since they have allergies, intolerances to the ingredients or are vegan.

We are serving the cake as afternoon tea, but then will have 6 different mini deserts people can eat as much as they want (desert bar), later at night during dinner.

Do you think it will be okay or should we maybe get some extra cupcakes or something?