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Ground Advantage Cubic: poly mailers move to cheaper tiers, and boxes up to 22 in. now qualify

  1. USPS Postage Effective · announced

    Ground Advantage Cubic: poly mailers move to cheaper tiers, and boxes up to 22 in. now qualify

    Since July 12, 2026, Ground Advantage Cubic soft packs (poly mailers and padded envelopes) are priced on 5 tiers instead of 10, set by length plus width: up to 21 in. is tier 0.10, up to 27 in. is 0.20, up to 31 in. is 0.30, up to 34 in. is 0.40 and up to 36 in. is 0.50. A 10 x 13 in. mailer (23 in.) was tier 0.30 and is now 0.20; a 12 x 15 1/2 in. mailer drops from 0.50 to 0.30. The longest side allowed for Ground Advantage and Priority Mail Cubic also rose from 18 to 22 in. The other limits are unchanged: 20 lb maximum, with up to 1 cubic foot for Ground Advantage and 0.5 cubic foot for Priority Mail.

    Your net on a $10 / $25 / $50 sale: +$0.57 / +$0.57 / +$0.57

    10 x 13 in. poly mailer, commercial Ground Advantage Cubic, Zone 1: tier 0.20 costs $8.22 instead of $8.79 for 0.30 at Oct 4 prices (same difference at base prices). Zone 5: +$1.59; Zone 8: +$2.83. A 12 x 15 1/2 in. mailer: +$1.45 in Zone 1 and +$2.86 in Zone 5 at peak prices (+$1.20 / +$2.36 at July 12, 2026 prices; USPS hasn't published the prices that follow Jan 17, 2027).

    Source: USPS final rule, Federal Register, May 15, 2026 (+ DMM 283 Jan 18 vs current) · verified

Cite this

The Reseller Index change tracker, "Ground Advantage Cubic: poly mailers move to cheaper tiers, and boxes up to 22 in. now qualify," https://resellerindex.com/changes/usps/2026-07-12-usps-ground-advantage-cubic-soft-packs/, verified Oct 14, 2026. Free to reuse with a link (CC BY 4.0).

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