Wrong size cake tins for recipe......

[VanillaPumpkin]

I have a recipe that needs two 20 cm cake tins. I only have one. I have two 18 cm ones or a 23cm one or a deep 18cm tin. Which should I use? TIA

I would use 2 18cm ones. They might need a little longer cooking time but check as per the recipe timing.

Thank you. My cooker is mad and fast and so I have to check cakes alot anyway. I will go for it