I am a photographer and a single printed photo can come in 3 different finishes and each finish can come in 10 different sizes. The Finishes represent a Good, Better, Best model and the price is dependent on the chosen size within each finish.

How should I enter this into Zoho Books for invoicing???

The only way that I can see to do this is to enter each and every finish and size combination as a separate item. What a mess!

Cloning existing items certainly makes that easier, but scrolling through (90) different items for each and every line item (a single invoice will have many photos) to pick out the correct size is going to be very tedious. 

What's more, I simplified the possible finishes and combinations for sake of clarity. It's actually quite a bit more complicated than this.

Is there not a way to Categorize items or have Item/sub-Item in Zoho Books??? Please tell me I'm missing something.