Your little one will spend hours creating lovely keychains and other accents with these shrinkable sheets from Shrinky Dinks. These sheets work well with pencils and permanent markers.Details: White8" x 10" (20.3cm x 25.4cm) sheet size10 sheets Shrinks to 1/3rd of its original size and become 9 times thicker Works great with permanent markers and pencils For ages 5 and up