Clairefontaine Pollen C6 Envelopes: Colours & Sizes
Clairefontaine Pollen C6 envelopes are 114 × 162 mm (4.5 × 6.4 in) envelopes of 120 g/m² paper, acid-free, FSC certified and dyed through its whole thickness. Clairefontaine sells the 20-pack in 23 colours and finishes, and makes them in Étival-Clairefontaine, France. US listings describe an adhesive strip seal.
On this page
Product facts
- Product
- Clairefontaine Pollen C6 envelopes, 114 × 162 mm, 120 g/m², pack of 20
- Brand
- Clairefontaine
- Brand origin
- France
- Made in
- France*
- Material
- 120 g/m² acid-free paper, dyed through, FSC certified
- Price range
- $$$5–20 per ream or pad
- Rate it
Notes on these facts
- Made by Clairefontaine Rhodia (Exacompta Clairefontaine group); sold in the US by Exaclair. Made in France: Clairefontaine's Pollen product page says the correspondence range is made in France in its workshops at Étival-Clairefontaine in the Vosges (une fabrication Française dans nos ateliers à Etival-Clairefontaine). Source. Price: example listing.
- Price bands are typical US retail, checked October 2026.
Key takeaways
- Each C6 envelope is 114 × 162 mm (4.5 × 6.4 in) and made of 120 g/m² paper, per Clairefontaine.
- Clairefontaine's French store lists the 20-pack in 23 colours, from black and kraft to gold, silver and iridescent white.
- An A6 card (105 × 148 mm) or an A4 sheet folded twice fits with 4.5 to 7 mm to spare on each side.
- Amazon US C6 20-packs average 4.8 stars across about 2,900 ratings (October 22, 2026); one pack sits in our $$ band.
- Clairefontaine says Pollen is made in its own mills at Étival-Clairefontaine in the Vosges, France.
What are Clairefontaine Pollen envelopes?
Pollen is Clairefontaine’s line of coloured correspondence paper, and the C6 envelope is its most common size. The paper is dyed through its whole thickness, so the colour doesn’t stop at the surface, and Clairefontaine says it’s acid-free and FSC certified.
Pollen also covers cards, sheets and other envelope sizes in the same colours, so you can match a card, its envelope and a letter. For writing paper to go inside, see the Clairefontaine Triomphe pad from the same maker.
Pollen C6 envelope specs
| Spec | Pollen C6 20-pack |
|---|---|
| Size | 114 × 162 mm (4.5 × 6.4 in) |
| Paper | 120 g/m², acid-free, dyed through, FSC certified |
| Count | 20 envelopes |
| Colours (20-pack) | 23 colours and finishes |
| Printing | Writing, inkjet and laser |
| Closure | Adhesive strip (Amazon US listings) |
| Example reference | 55496C (Noir), EAN 3329680554960 |
| Made in | Étival-Clairefontaine, France |
Size, paper, colours and origin are from Clairefontaine’s product pages, read on October 22, 2026. Each colour has its own reference and barcode.
Which colours are there?
Clairefontaine’s French store lists 23 colours and finishes for the C6 20-pack. They are:
- Whites and neutrals: Blanc, Blanc naturel, Ivoire, Gris acier, Noir, Kraft
- Iridescent: Argent, Or, Blanc irisé, Ivoire irisé
- Colours: Bleu, Bleu lavande, Bleu turquoise, Clémentine, Jaune soleil, Lilas, Rose dragée, Rose fuchsia, Rouge groseille, Vert bourgeon, Vert menthe, Vert sapin, Violine
Single envelopes and 5-packs come in more shades, about 45 in C6, including marbled and laid finishes. The 120 g/m² weight is heavier than most letter paper; our paper weight guide explains the scale.
Which colour should you choose?
Pick by what you’ll write with: light colours for everyday pens, dark ones only if you have a white or metallic pen. Blanc, Ivoire, Kraft and the pale shades such as Rose dragée and Bleu lavande take any blue or black ink, so the address stays readable to the post office.
Noir, Vert sapin and Violine look striking but need a white gel pen or a light address label. Or and Argent have an iridescent finish (papier irisé); Clairefontaine says all Pollen paper takes writing and printing, but test your pen on the back flap first. Because Pollen is dyed through, the colour stays the same inside the envelope.
What fits in a C6 envelope?
An A6 card, an A4 sheet folded in four, or a 4 × 6 in postcard. A6 is 105 × 148 mm, which leaves about 7 mm at each end and 4.5 mm above and below.
A letter on A5 paper, such as the Midori MD Letter Pad at 210 × 168 mm, needs folding twice to fit. US greeting cards sized 5 × 7 in are too big; use a larger envelope for those.
How do you seal them?
US listings describe an adhesive strip, so you peel and press rather than lick. Amazon’s C6 20-pack listings say “adhesive strip for easy seal”. Clairefontaine’s own product page doesn’t describe the closure, and some other Pollen sizes (C5) are sold with a gummed seal, so check the listing for the size you buy.
For a decorative finish over the flap, Rifle Paper Co. Gemma envelope seals are stickers made for the job.
Are they popular in the US?
Yes, in the colourful-envelope niche. On October 22, 2026, Amazon US C6 20-pack listings averaged 4.8 stars across about 2,900 ratings shared between colours, and one pack sits in our $$ band ($5–20).
At 4.5 × 6.4 in, a flat C6 is within the US Postal Service’s letter size range. Dark envelopes such as Noir need a white or metallic pen for the address, or a light label.
Where are Pollen envelopes made?
In France: Clairefontaine says Pollen is made in its own workshops at Étival-Clairefontaine in the Vosges. Its Pollen page dates that know-how to 1880; Clairefontaine is part of the Exacompta Clairefontaine group, which also owns Rhodia.
Frequently asked questions
What size is a C6 envelope in inches?
About 4.5 × 6.4 in. Clairefontaine gives the Pollen C6 as 11.4 × 16.2 cm, the standard ISO C6 size.
Does an A6 card fit in a C6 envelope?
Yes. An A6 card is 105 × 148 mm and a C6 envelope 114 × 162 mm, so it slides in with a few millimetres to spare. An A4 sheet folded twice or a 4 × 6 in postcard also fits.
Are Clairefontaine Pollen envelopes self-sealing?
The Amazon US listings for the C6 20-packs say they have an adhesive strip for an easy seal. Clairefontaine's own page doesn't describe the closure.
Can you print on Pollen envelopes?
Yes. Clairefontaine says Pollen paper works for writing and for inkjet and laser printing.
How many colours do Pollen C6 envelopes come in?
Clairefontaine's French store lists the C6 20-pack in 23 colours and finishes, and sells single and 5-packs in more, about 45 shades in C6 alone.
Can you mail a C6 envelope in the US?
Yes, at 4.5 × 6.4 in it's within the US Postal Service's letter size range. Square or very thick envelopes cost more; a flat card in a C6 mails as a letter.
Are Clairefontaine envelopes made in France?
Yes. Clairefontaine says its Pollen correspondence range is made in its own workshops at Étival-Clairefontaine in the Vosges.
Sources
- Clairefontaine: 20 enveloppes Pollen C6 (11,4x16,2cm) (read in full: 23 colours, reference 55496C, EAN 3329680554960, 11.4 × 16.2 cm, 120 g/m²; made in France at Étival-Clairefontaine; acid-free, dyed through, FSC, for writing, inkjet and laser)
- Clairefontaine: Enveloppes Pollen category (453 items; C6 20-pack, 5-pack and single colour lists, read October 22, 2026)
- Clairefontaine: Enveloppe Pollen 114x162 clémentine pqt 20 (older reference 5496C, EAN 3329680549607)
- Amazon US: Clairefontaine Pollen Adhesive Envelopes, C6, 120 g - Lilac, Pack of 20, ASIN B001AO1VBM (4.8 stars, 2,915 ratings; adhesive strip, acid free, laser and inkjet)
- Amazon US: search results for Clairefontaine Pollen envelopes (C6 adhesive 20-packs; C5 packs with gummed seal, read October 22, 2026)
- USPS: Postal Explorer, letter size standards