Bound in booklets of 25 sheets, each number is backed with a low-tack adhesive, meaning you can place the markers on evidence and later remove it without marking the surface. Each booklet comes in both large and small numbers. The overall size of the Small Adhesive Numbers booklet is 2" x 7.75" and the Large Adhesive Numbers booklet is 4.5" x 8.75". The Small Adhesive Numbers booklet contains the numbers 1-15 and one “North” arrow on each page. Each marker is 0.75" high. The Large Adhesive Numbers are approximately 2" high and include the numbers 1-10.