CAKE TIN SIZE CHART

Full tin size

20cm round

or 18cm square

23cm round

or 20cm square

25cm round

or 22cm square

Half-quantity tin size

14cm (or 15cm) round

or 12.5cm square

16cm round

or 15cm square

18cm round tin

or 16cm square (15 x 17.5cm oblong)

Third-quantity tin size

12cm round

or 10cm square

13cm round

or 12cm square

14cm (or 15cm) round

or 12.5cm square

Quarter-quantity

tin size

10cm round

or 9cm square (5 x 10cm oblong)

11cm round

or 10cm square

12cm round

or 11cm square (10 x 12cm oblong)

Send your culinary conundrums to Xanthe Clay: Email askxanthe@ telegraph.co.uk Write to Ask Xanthe, The Daily Telegraph, 111 Buckingham Palace Rd, London, SW1W 0DT

The best questions will win a Thermapen digital cooking thermometer