SIZE & FIT

Cello Bag Size Guide

Compare usable internal dimensions, additional self-seal flap measurements and typical uses across the CelloBag range. Measure the complete finished item you plan to pack, then use the exact size comparison below to choose with confidence.

Usable internal dimensions Every size shown below is the usable space inside the bag. The self-seal flap is additional.

Use A3, A4 and A5 for the core print formats; 5×7, 6×6 and 3×5 for photos and smaller work; and C5 or C6 for cards, invitations and envelopes. Always choose by the complete finished item, not the size name alone.

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40 micron OPP Self-seal 100 & 200 packs
How to measure an item for CelloBag.co.uk cello bags using usable internal dimensions

EXACT SIZE COMPARISON

Choose your size

Compare usable internal dimensions, self-seal flap depth and typical use. Always measure the finished item rather than relying only on its nominal paper or photo size.

Usable internal dimensions, additional flap sizes and typical fit for all CelloBag sizes
Size Usable internal dimensions Self-seal flap (additional) Typical fit / use View
A3 305 × 425 mm 30 mm A3 paper 297 × 420 mm · large prints & artwork View A3
A4 218 × 300 mm 20 mm A4 paper 210 × 297 mm · prints, artwork & documents View A4
A5 155 × 214 mm 20 mm A5 paper 148 × 210 mm · smaller prints, photos & cards View A5
5×7 138 × 185 mm 20 mm 5×7 print 127 × 178 mm · photos & smaller artwork View 5×7
C5 170 × 235 mm 20 mm Cards, envelopes & A5-format contents — measure the finished item View C5
C6 120 × 170 mm 20 mm Greeting cards, envelopes & invitations View C6
6×6 155 × 155 mm 20 mm Square cards, prints & paper goods View 6×6
3×5 76 × 127 mm 20 mm Mini prints & small cards — check the exact finished dimensions View 3×5

RANGE SPECIFICATION

Choose the right fit, first time.

Core construction and pack details are consistent across the CelloBag range. Compare your complete finished item with the usable internal dimensions, allow a little clearance, then choose the size and pack that fits your work.

CelloBag.co.uk cello bag size guide showing usable internal width, height and self-seal flap
MATERIAL
40 Micron OPP (Oriented Polypropylene)
FINISH
Crystal Clear
CLOSURE
Self-Seal / Peel & Seal
FIT
Usable Internal Dimensions
PACK OPTIONS
100 Pack / 200 Pack
PRESENTATION
Clean Edges · No Hang Holes

Clean Edges

No distracting stitched-look side-seal lines or stick-on side edges, helping prints and artwork look clean and professionally presented.

No Hang Holes

A clean top edge designed for prints, artwork and documents rather than hanging retail displays.

Peel & Seal Closure

Peel the release strip and press the self-seal flap closed — no separate tape needed.

Made for Presentation

Crystal-clear film keeps prints, artwork, documents and photos visible while packed.

1

Measure

Measure the complete finished item going inside.

2

Match

Compare it with our usable internal dimensions.

3

Seal

Insert the item, peel the release strip and press closed.

NEED TO KNOW

Frequently asked questions

Quick answers on usable internal dimensions, self-seal flap measurements and choosing the right cello bag size.

Visit the Help Centre
Do the listed dimensions include the self-seal flap?

No. The dimensions shown in the guide are the usable internal bag dimensions. The self-seal flap is additional.

Should I measure the paper size or the finished item?

Measure the complete finished item, including any mount, backing board, envelope or protective insert that will go inside the bag.

How much clearance should I allow?

Allow enough room for the finished item to slide in comfortably. Mounted or backed work generally needs more clearance than a single sheet of paper.

Will an item fit if it has exactly the same measurements as the bag?

Not necessarily. Exact or near-exact measurements can be too tight once item thickness and normal manufacturing tolerance are considered.

Why should I check the 3×5 fit carefully?

The 3×5 name is nominal and the usable internal dimensions are 76 × 127 mm, so measure the actual finished item in millimetres before ordering.

Still have a question? Visit the Help Centre