Be sure to acknowledge receipt of this great tool! Our 2 or 3-part form receipt booklet is carbonless and perforated with 3 receipts per page. There are 252 sets per book and the detached size is 2 7/8" x 6". You get consecutive numbering in black up to 6 digits. If starting number isn't indicated, 1001 is used. This item uses environmentally responsible NatureSolv (TM) technology with naturally-based organic solvents.