GREETING CARD SIZE GUIDE
Find the right cello bag for your cards
Compare our most useful greeting card sizes using the usable internal dimensions. Measure the largest item going inside — including the card, envelope and any inserts — before ordering. The self-seal flap is additional to those dimensions.
Choose your cello bag size
These are the four main CelloBag sizes we recommend starting with for greeting cards, invitations and handmade cards.
C6
A strong starting point for greeting cards, invitations and envelopes.
Shop C6 →5×7
Useful for 5×7 cards, photographs, prints and creative work.
Shop 5×7 →6×6
Designed for square greeting cards, handmade cards and prints.
Shop 6×6 →C5
A larger option for greeting cards, invitations and A5-format work.
Shop C5 →Measure what actually goes inside.
Measure the largest item going inside — including the envelope, inserts or backing board — and compare it with the usable internal dimensions. Allow enough room for thicker card stock or multiple pieces.
Three quick checks
Measure
Measure the finished card and envelope at their widest and tallest points.
Compare
Compare those measurements with the usable internal cello bag dimensions.
Allow room
Choose a little extra space if the pack is thick or contains additional inserts.
Greeting card cello bag sizes
| Size | Usable internal size | Typical use | Shop |
|---|---|---|---|
| C6 | 120 × 170 mm | Greeting cards & invitations | Shop C6 → |
| 5×7 | 138 × 185 mm | 5×7 cards, photos & prints | Shop 5×7 → |
| 6×6 | 155 × 155 mm | Square greeting cards | Shop 6×6 → |
| C5 | 170 × 235 mm | Larger greeting cards & invitations | Shop C5 → |
Ready to choose your card size?
Shop the four core card sizes or browse the complete CelloBag range. Compare all eight sizes in the main Size Guide.