Pack of 100 white C4 rigid corrugated mailers, 214 x 312 mm, with red adhesive strip

C4 Rigid Mailer 214 x 312mm fits AusPost Large Prepaid M243 - photo 2

Open white C4 rigid corrugated mailer, 214 x 312 mm, showing red adhesive strip

Pack of 100 white C4 rigid corrugated mailers arranged in a shipping carton

Roll over image to zoom in Click on image to zoom

C4 Rigid Mailer 214 x 312mm fits AusPost Large Prepaid M243

SKU: M243-100

Inside 214 x 312mm
Fits A4
Rigid, resists bending

Pack size: x100

Price:

$64.50

$0.65 each

Tax included Shipping calculated at checkout

Number of packs:

90-day returns on unopened items
Prices include GST
Pickup or fast delivery

Pickup available at Minto Sydney

Usually ready in 1 hour

Delivery

Sydney & Melbourne metroFree over $500
Wollongong$50 flat rate
Gosford & Newcastle$75 flat rate

Flat rates cover orders up to 2 tonnes.

Same size, other colours

White, brown and black in popular sizes.

See all →

Need a different size or a bulk order?

Talk to us about wholesale cartons and larger runs.

Contact us →

The new C4 Rigid Mailer 214mm x 312mm, perfect for Australia Post Prepaid Envelopes. Built for durability, this mailer protects documents, photos, and flat items from bending, ensuring safe delivery. Ideal for professional and personal use, offering secure, reliable mailing every time.

Size: 214x 312mm , Designed for Mailing C5 Document in Australia POST prepaid envelope
F-Flute Corrugate Cardboard, Lighter, Hard & Eco Friendly
Very Sticky Glue eliminates the need for staples and tape to secure package.
High Quality with 90 Days Money Back Guarantee
eBPak Signature Product, Unmatched Quality at Everyday Low Price.
100% Recyclable Product

Slide documents, prints or photos in flat. A sheet of card on each side adds extra protection.
Peel the liner off the glue strip and press the flap down firmly.
Write "Please do not bend" on the front for prints and photos.
Stick your shipping label on the flat front, away from the flap.

Free delivery to Sydney & Melbourne metro on orders over $500.
$50 flat rate to Wollongong areas and $75 to Gosford & Newcastle areas (up to 2 tonne).
Australia-wide delivery via Australia Post and trusted couriers.
Free pickup from Minto NSW or Braeside VIC, Mon–Fri 9am–4pm.
90-day returns on unopened items. See our refund policy.

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

C4 Rigid Mailer 214 x 312mm fits AusPost Large Prepaid M243

Sizing

What fits in this envelope

Inside: 214 x 312mm

Suits certificates, A4 documents and prints that must not bend
A4 sheets and books fit flat
Fits inside an Australia Post Large prepaid envelope
Choose a size 20–30mm wider and longer than your item, so the flap still seals over thicker items

Not sure? Use the size guide below or call us on (02) 8750 5347.

Rigid mailer size guide

Our most popular rigid mailer sizes, smallest to largest.

Size	Inside (mm)	Good for	Link
DL	120 x 228	Vouchers, tickets, DL documents	View →
C5	152 x 227	A5 documents, cards, photos	View →
A5	170 x 230	A5 prints and photos	View →
C4	214 x 312	A4 documents, fits AusPost Large prepaid	This size
A4	240 x 330	A4 certificates and prints	View →
A3	330 x 450	A3 prints and posters	View →
A2	450 x 630	A2 prints and artwork	View →

Self Sealing LP Record Wrap V6 335 x 335mm

Self Sealing LP Record Wrap V6 335 x 335mm 12" Vinyl

Self Sealing LP Vinyl Record Wrap Mailer 335 x 335 x 60mm V6 M170

From $81.63

$1.63 each

Ultimate Black LP Vinyl Rigid Mailer M341

Ultimate Black 12in LP Vinyl Rigid Mailer 345 x 345mm M341

$117.50

$1.18 each

A4 Rigid Envelope 240mm x 330mm Corrugated Board Brown

Brown/Red A4 eFlute Rigid Envelope 240 x 330mm Corrugated Mailer M616

From $22.50

$0.90 each

Brown A3 Rigid Mailer 330mm x 450mm eflute Corrugated

Brown/Red A3 eFlute Rigid Mailer 330 x 450mm Corrugated Envelope M449

From $68.50

$1.37 each

700gsm A4 Rigid Mailer 240mm x 330mm White

A4 Rigid Mailer 240mm x 330mm White 700gsm M443

$79.60

$0.80 each

700gsm A3 Rigid Mailer 330mm x 450mm White eBPak

A3 Rigid Mailer 330mm x 450mm 700gsm White M422

From $18.90

A2 Rigid Mailer 450 x 630mm Brown Hard Envelope eFlute Red M458

$61.50

$2.46 each

A5 Rigid Mailer 170 x 230mm 700gsm Glossy White

$49.50

$0.50 each

A5 Rigid Mailer 170mm x 230mm eFlute Brown Red M240

$45.95

$0.46 each

LP Vinyl Mailer 345 x 345mm 12 inch eFlute Brown Plain M065

$116.30

$1.16 each

Vinyl Record Rigid Mailer 225 x 205mm for 7 inch Vinyl EP

Vinyl Record Rigid Mailer 225 x 205mm for 7 inch Vinyl EP eBPak

7in Vinyl EP Rigid Mailer 225 x 205mm Brown Plain M318

$63.65

$0.64 each

Wholesale LP Vinyl Wrap Mailer 335 x 335 x 60mm V6 M170

$697.86

$1.40 each

36 rollsAdhesive Clear Packaging Sealing Tape 48mm x 75m

Clear Packing Tape 48mm x 75m 45um A005 – Carton of 36 Rolls

$35.53

$0.99 each

Heavy Duty Clear Packing Tape 48mm x 75m 52micron A006 - photo 2

Heavy Duty Clear Packing Tape 48mm x 75m 52micron A006 x36 Rolls

$48.77

$1.35 each

Save $10.13

Clear Pallet Wrap 500mm x 285m Stretch Film 25U

Clear Hand Stretch Film 500mm Pallet Wrapping 25U

Clear Pallet Wrap 500mm x 285m Hand Stretch Film 25U x4 Rolls

$62.37 $72.50

$15.59 each

White A5 Document Enclosed Pouch 240 x 185mm Sticky Envelope

From $34.60

$0.07 each

Clear Packaging Tape 48mm x 75meter 45um

Starter Pack - Clear Packing Tape 48mm x 75m 45u A005

Starter Pack - Clear Packing Tape 48mm x 75m x12 Rolls 45u A005

$15.20

$1.27 each

36 Rolls Waterless Kraft Paper Brown Packing Tape 48mm x 50m 130U A011

$94.76

$2.63 each

Kraft Paper Packaging Tape 48mm x 50m 130um

6 Rolls Kraft Paper Brown Packing Tape 48mm x 50m 130U

$27.50

$4.58 each

White Plain Document Enclosed Pouch 110 x 150mm Sticky Envelope

From $29.90

$0.03 each

White Invoice Enclosed Envelope 115 x 150mm eBPak

White Invoice Enclosed Envelope 115 x 150mm M153

From $29.99

$29.99 each

Premium Packing Tape Dispenser with Handle

$9.95

$9.95 each

108 Rolls Adhesive Clear Packaging Sealing Tape 48mm x 75m A005 45u

$104.76

$0.97 each

Fragile Packing Tape 48mmx75m 45u Orange Black A008 x36 Rolls

$49.95

$1.39 each

Questions about this envelope

Will a rigid mailer stop my item bending?

Yes. Rigid mailers are made from stiff board (700gsm card or corrugated eFlute), so prints, photos and documents arrive flat. For extra care, write "Please do not bend" on the front.

Will it fit an Australia Post prepaid envelope?

Our DL, C5 and C4 rigid mailers are sized to go inside the matching Australia Post prepaid envelopes. It's in the product title when a mailer is made to fit.

How do I seal it?

Peel the liner off the glue strip and press the flap down firmly.

What's the difference between rigid mailers and card envelopes?

Rigid mailers are made to resist bending. Card envelopes (tough bags) are strong 250–300gsm card that protects documents and catalogues but can flex a little.

What does the pack size mean?

The pack size is how many envelopes come in one pack, for example 100 is a pack of 100 envelopes. "Number of packs" sets how many packs you get, so a pack of 100 with 2 packs is 200 envelopes.

Can I return the envelopes, or pick up my order?

Yes to both. We offer 90-day returns on unopened items (see our refund policy), and you can choose pickup at checkout and collect from Minto NSW or Braeside VIC, Monday to Friday 9am to 4pm.

Need it today? Pick it up.

Order online and we'll usually have it ready in 15–30 minutes at either warehouse.

NSW

Sydney — Minto

Unit 2, 1 Swaffham Road, Minto NSW 2566

Mon–Fri 9am–4pm · Sat–Sun closed

Get directions

VIC

Melbourne — Braeside

21–23 Endeavour Way, Braeside VIC 3195

Mon–Fri 9am–4pm · Sat–Sun closed

Get directions

Talk to our team

Call us on (02) 8750 5347

Fast delivery Australia-wide

Via Australia Post and trusted couriers

Pickup in Sydney & Melbourne

Minto NSW and Braeside VIC

90-Day Returns

On unopened items

C4 Rigid Mailer 214 x 312mm fits AusPost Large Prepaid M243

Description

Payment & Security