stamps.com (sheet of 25)
US POSTAGE / postal code / license number

without extra imprint
extra imprints: FIRST-CLASS / PRIORITY / PARCEL POST / EXPRESS

stamps.com (sheet of 25)
US POSTAGE / license number / postal code

without extra imprint
extra imprints: FIRST-CLASS / MEDIA MAIL / BOUND PRINTED MATTER / BPM / PRIORITY / PARCEL POST / EXPRESS