We have used these charts in various "hand drawn" sizes over the years and I just recently figured how to make them in MS word for easy printing. This size is my favorite but we also have it in a full 8.5 x 11 sheet and a extra large 8.5 X 14 legal size. If you decide use any of these charts I would suggest that you print a copy out and then use a standard copy machine to "photcopy" it ( the home printer ink will bleed if you get it too humid in your herp room). Also I like to print mine on heavy card stock and keep them in a little file box. The back of the cards is used for any notes to be kept for that animal. Hope you enjoy them as much as we do. Feel free to alter them to fit your needs.