I guess if you are making the smaller cards from 1/4 of a regular sheet of card then the "Boo" and the "EEK" would be too large to use. However, I loved those two stickers so much I designed 1 card to be 5-1/2" x 8-1/2" and the other is a tri-fold card using one half of 12 by 12 card.
The quality of the chipboards is awesome in that the swirls and ornate designs on both of the larger stickers are strong enough to bend without the board breaking. The glitter is really well glued.
I have had issues with other glitter chipboard pieces in that by the time I finished there was more glitter on my work surface than on the card!
If you like to make classy, haunted looking cards, and not necessarily Halloween cards, these stickers are for you, especially the 2 larger ones.
I should mention here that I made a birthday card with the "EEK" sticker and a "Just Because" card from the "Boo".
I will post pictures on my profile page as soon as I can.
Really to large to use on cards....Be great for layouts. I have no little ones so I'll chop it up and use it elsewhere.