Non-Machinable Stamps
$1.12 California Dogface Butterfly Postage Stamps
Original price was: $112.00.$89.60Current price is: $89.60.The stamp art was digitally created using images of preserved butterflies as a starting point. The result is a highly stylized, simplified image of a California Dogface (Zerene eurydice) rather than an exact reproduction.
$1.12 Colorado Hairstreak Postage Stamps
Original price was: $112.00.$89.60Current price is: $89.60.The Colorado hairstreak butterfly graces the eighth non-machineable butterfly stamp for use on irregularly sized envelopes, such as square greeting cards, invitations, or announcements. The stamp art was digitally created using images of preserved butterflies as a starting point. The result is a highly stylized, simplified image of a Colorado hairstreak rather than an exact replica.
2022 $2 Floral Geometry Forever First Class Postage Stamp
Original price was: $100.00.$80.00Current price is: $80.00.
2022 Palace of Fine Arts Express Priority Stamps
Original price was: $539.00.$431.20Current price is: $431.20.
2023 John Lewis Forever First Class Postage Stamps
Original price was: $82.00.$65.60Current price is: $65.60.100 USPS-issued stamps. Confirmed packaging: 100 Stamps 5 Sheets. Price, stock and delivery details are shown on this product page.
2025 Luna Moth $1.27 Non-Machinable Stamps – 100 Stamps
Original price was: $127.00.$101.60Current price is: $101.60.100 USPS-issued Fixed denomination stamps. 100 Stamps / 5 Sheets.
Non-machinable stamps are intended to help pay the postage for First-Class Mail letters that trigger the USPS nonmachinable surcharge. Common reasons include square shape, excessive rigidity, an uneven surface, or other characteristics that prevent normal machine processing.
Identify the mailpiece first
A stamp labeled for a nonmachinable surcharge does not automatically make every unusual envelope acceptable as a letter. The piece must still fit the applicable letter standards. If it is too thick, too rigid, or otherwise outside those standards, it may be priced as another mail class.
Typical situations to check
- Square greeting cards or invitations.
- Clasps, buttons, pens, keys, or uneven contents.
- Rigid inserts that keep the envelope from bending normally.
- Address orientation or shape outside standard processing rules.
Rates can change, so compare the stamp's current postage value with the required surcharge and base letter postage. When uncertain, take the finished piece to a Post Office or use the USPS calculator.
Page reviewed: August 25, 2026. Product availability and postal rates can change.