what sizes to use?

Ive 5 words that I want very big and 23 that I want small. What sizes should i use to keep the small ones small (espcially the letter words) and the big big please? Yes, I am using the 'use column size' setting already.

You can try setting size column to 100 for big words while setting other sizes to 1. If it doesn't work you can always switch to edit mode and size the words manually.