Just print, peel and post! Printable postage stamp sheets are an easy and efficient solution to meet your mailing needs. Perforations allow the sheets to fold and detach, making it easy to transport. Print First-Class Mail, Priority Mail Flat Rate Envelopes and Boxes. Eight 8-1/2 x 11 sheets of USPS-approved stamp ready labels. No contracts or monthly fees. Use on PC or Mac with internet connection and standard inkjet or laser printer. Label Size - text: 8 1/2 x 11; Label Color(s): White; Border Color(s): Red; Sheet (W x L): 8 1/2 x 11.