B5 Envelope Size 176 × 250 mm — Custom Printing

176 × 250 mm B5 Envelope — Custom Manufacturing Options

The B5 envelope measures 176 mm wide × 250 mm high, one of the ISO B-series formats. It is larger than a C5 envelope (162 × 229 mm) and smaller than a B4 (250 × 353 mm), which makes it the practical choice for A5 booklets, folded A4 documents, and trade paperbacks. Because it carries slightly more surface area than C5, B5 gives a branded return address or full-color design more room without moving up to a large flat. We manufacture B5 envelopes from economical 80 g/m² woodfree through to 350 g/m² pearl ice-white for luxury events.

Typical use case: A5 sheets mailed flat, A4 folded once, books and catalogues, brochures, certificates

All b5 envelopes listed below are manufactured to your specification — choose your paper, printing, finishing, and quantity, then request a quote for factory-direct pricing.

B5 Envelope Specifications

Dimensions are given as width × height on the finished, glued envelope.

Property	Value
Dimensions (mm)	176 × 250
Dimensions (inch)	6.93 × 9.84
International equivalent	B5 (ISO 216)
Opening style	Open side (wallet flap)
Common paper weight	100–120 g/m² woodfree
Best for	A5 flat, folded A4 documents, books and catalogues

What fits inside a B5 envelope

Contents	Size (mm)	Fits inside B5?
A5 sheet	148 × 210	Yes — flat, with comfortable margin
A4 sheet, folded once	148.5 × 210	Yes — flat
A4 sheet, unfolded	210 × 297	No — too large for B5
B6 booklet	125 × 176	Yes — with margin around it
A6 card or postcard	105 × 148	Yes — loose fit

Paper Material & Weight Options

Seven paper stocks are available for custom b6 envelopes. Every material below can be combined with your choice of printing and finishing.

Material	Available GSM (g/m²)	Best suited for
Woodfree	80, 100, 120, 140, 160, 200, 250	Everyday business — color or mono printing
Kraft yellow	80, 100, 120, 150, 180, 200, 250, 300, 350, 400	Durable & opaque — blank or single-color
Kraft white	100, 120, 150, 180, 200, 230, 250, 300	Durable & printable — premium business
Art coated	105, 128, 157, 200, 250, 300, 350	High-gloss color — promotions, invitations
Single-coated (white card)	210, 250, 300, 350	Rigid & thick — premium card enclosures
Matte art	105, 128, 157, 200, 250, 300	Low-gloss color — refined business
Pearl ice-white	120, 140, 160, 200, 250, 300, 350	Pearlescent — luxury invitations, commemorative

Printing Color Options

From blank envelopes to full-color CMYK — every printing level is available for custom b6 envelopes.

Print level	Description
Full color (4C)	Four-color CMYK — photographic quality
2 color	Two spot colors
1 color	Single-color text or logo
Blank (no print)	Plain white / kraft natural

Post-Press Finishing Processes

Every finishing option below can be applied to custom b6 envelopes. Mix and match to achieve your desired look and function.

Process	Available options
Lamination	None / Gloss (single-side) / Matte (single-side) / Anti-scratch matte / Soft-touch / Holographic
Varnish	None / Gloss varnish (single-side)
Embossing	None / Standard embossing plate / Deep embossing plate
Flat foil	None / Standard flat foil / Sculpted foil
Foil color	None / Gold / Matte gold / Red gold / Blue gold / Black gold / Silver / Custom color
Tape	None / Double-sided tape / Release tape
Self-adhesive	None / Self-adhesive (gummed flap)

Quantity Tiers & Quote Request

Configure your b6 envelope specifications above, then select a quantity tier and submit a quote request. We respond with an exact price within 24 hours. No prices are published online — every order is quoted individually based on your exact material, printing, and finishing choices.

Quantity	Action
500 pcs	Request Quote →
1,000 pcs	Request Quote →
2,000 pcs	Request Quote →
3,000 pcs	Request Quote →
5,000 pcs	Request Quote →
10,000 pcs	Request Quote →

⚠️ All prices are quoted individually. Configure your specifications above, then submit a request — we respond with an exact quote within 24 hours. No prices are displayed on this page.

Frequently Asked Questions

What size is a B5 envelope?

A B5 envelope measures 176 mm × 250 mm (width × height) on the finished, glued envelope, following the ISO 216 B-series. That is slightly larger than a C5 envelope and smaller than a B4.

Is B5 bigger than A4?

No. An A4 sheet is 210 × 297 mm, so B5 at 176 × 250 mm is smaller than A4. A B5 envelope holds an A5 sheet flat, or an A4 sheet folded once.

Is B5 the same as C5?

No. C5 measures 162 × 229 mm and is designed to hold an A4 sheet folded in half. B5 measures 176 × 250 mm, which is a little larger in both directions.

What is the difference between B5 and B6?

B6 measures 125 × 176 mm, so B5 is the larger of the two. B6 suits small booklets and greeting cards; B5 suits books, catalogues, and folded A4.

What fits in a B5 envelope?

A5 sheets flat, an A4 sheet folded once, trade paperbacks and catalogues, brochures, and certificates. Anything larger than 250 mm in either direction will need a B4 or a large flat.

Does a B5 envelope need extra postage?

B5 usually exceeds common letter-size limits, so it typically mails as a large envelope or flat rather than a standard letter. Exact thresholds differ by postal service and change over time, so confirm the current limit with your carrier before committing to a mailing.

Ready to order custom B5 envelopes?

Configure your specifications and get a factory-direct quote within 24 hours. No obligation, free digital proof included.

Request a Quote → Custom Manufacturing →

Explore Other Envelope Sizes

Compare all standard envelope sizes manufactured by EnvelopeDock. Click any size for full specifications, material options, and custom ordering details.

Also see: B-Series Envelope Sizes · Business Envelopes · Printing & Finishes · Custom Manufacturing · Wholesale & Bulk Orders · Key Card Holders

B5 Envelopes