HyperCard 2.0 supports card sizes from 64-by-64 to 1280-by-1280 pixels.
For reasons of performance and simplicity, ALL CARDS WITHIN A STACK ARE THE SAME SIZE.
The width of a card must be a multiple of 32: a card can be 64, 96, 128, 256, or 672 pixels wide, but not 100, 67, or 1111 pixels wide. This ensures good performance for screen operations.