Other Stamp Varieties
US Stamp Sheets
Historically, most stamps were printed and sold by postmasters in whole sheets, which means that sheets, per se, are not uncommon. However, most postal customers bought these sheets—and still buy them today—for their individual stamps, which were torn from the sheet along perforations before self-adhesive stamps became the standard. The size of the first sheets was often governed by the size of the plate that printed them. Because the...