yourATCstore I Wonder? #11 Collage Sheet. This I wonder collage sheet has 16 gorgeous beauties pondering thoughts of love and life. What do you think they are wondering about? These are beautiful images of beautiful women for ATCs, greeting cards and collage project. This matte finish collage sheet is professionally printed and comes in a crystal clear bag for protection. Sheet measures 8 1/2" X 11" and are Acid Free.