How do I work out how large a cake tin I have?
You are looking at a 8.5" x 4.5" x 2.5" (or 7.25" x 4.5" x 3.5", high sided model) bread pan.  If you are looking at using a different shape, it might affect the texture of the cake, but you'll have to calculate the volume difference from there.  Something around 100-114 cubic inches. (Length x width x height).