Enrollment bonus · Module 6
Weigh it before you post it
One extra charm can push an envelope into the next postage band and quietly delete your margin. Build your envelope from its parts, see the weight, and pick the band on purpose.
What's in the envelope
Weigh one of each on a kitchen scale once, then reuse these numbers forever.
Shape and destination
Rigidity matters as much as weight.
Total weight
42.0 g
1.48 oz
Cheapest service
First-Class letter — $1.52
Your options
Prices are 2026 retail; edit weights above to compare.
First-Class letter
$1.52
up to 2 oz
Rigid contents force the non-machinable surcharge — a flat envelope is cheaper.
Large envelope (flat)
$1.81
2 oz
For anything over 3.5 oz or thicker than a letter. Must still be flexible.
Ground Advantage
$5.15
4 oz
Tracked. The right call for rigid mailers, charms or anything you can't risk.
Headroom
- Grams left before 2 oz
- 14.7 g
- Extras that would still fit
- 3
- Postage per box
- $1.52
- Postage on 100 boxes
- $152.00
Where the weight is
- Sticker sheets (×3)
- 16.5 g
- Envelope
- 6.5 g
- Rigid board (×1)
- 9.0 g
- Tissue paper
- 2.5 g
- Note card
- 3.5 g
- Extras (×1)
- 4.0 g