Why Choose Us

Quality Assurance

Quality Assurance

Continuous Quality Improvement to ensure our envelopes quality meet the requirements

Excellent Service

Excellent Service

Guest satisfaction is our first priority. We are working very hard to ensure each client's stay does meet their expectations

Advance Technology

Advance Technology

Advanced Technology Applies sophisticated envelope production technology from Germany.

Environmental Commitment

Environmental Commitment

we are accredited with the ISO 14001 to ensure environmentally friendly production processes are achieved and FSC/PEFC Certified

Global Market

Export to over 50 countries

We mainly export to the world market

Continues Improvement

Continues Improvement

Bring in continuous improvement concept to enhance customer satisfaction


To be World Class Manufacturer who is one-stop solution provider for stationery and envelopes.


We aim to be World Class Manufacturer through
continual improvement in quality system to achieve customer satisfaction.



Awarded ISO 9001:2008 certification on Quality Management System

Awarded ISO 14001:2004 certification on Environmental Management System

Awarded FSC Chain of Custody Certification

Awarded PEFC Chain of Custody Certification

Our Milestone

No matter the occasion, we are always there

Tips of choosing the right envelope?

First, there are two basic styles of envelope – Wallet or Pocket. Wallet: If the flap is on the long edge of the envelope then this defines the envelope as a wallet or a banker. Pocket: If the flap is on the short edge of the envelope then it’s called a pocket. The most common pocket envelopes are C5 and C4.

Second, there are variety of envelope style to choose from. Some of the most common styles available at wholesale envelope suppliers include flap variations, like wallet flap, diamond flap, banker & square flap.

Envelopes can be made from paper or synthetic materials. Most envelopes are made from paper. There are six main types of paper grades used in envelope production: Wove, Surfaced Enhanced White Wove, Kraft, Recycled, Specialty, and Tear-resistant. While the range of paper thickness in between 70gsm to 130gsm

After choosing the style of envelope, make sure the wholesale envelope supplier offers that envelope in the correct size. Generally, select an envelope that’s at least 5 millimeters larger than the paper for easy insertion. If you’re mailing thicker items, you’ll probably need an extra size or two larger to accommodate greater width.

The glue must be appropriate for the envelope function. That means that, if it involves automatic enveloping the glue that is used should be one that reacts to the moistening with water (used in enveloping machines), if it is intended for normal use, most common use is peel and seal. Window or without window.

Certification Helps Manufacturers Prove and Improve the Quality of their Products like ISO 9001 Certified. ISO 14001 certification make sure the manufacturing process reduce their environmental footprint by adopting an effective environmental management system (EMS)While manufacturer certified by PEFC & FSC which ensure that the product made with materials from well-managed forest and/or recycled sources. 

What customers say about us...

Meet our Team


What quantities do you sell?

We sell our products in different quantities. Our standard quantity breakdown is 250pcs, 500pcs or 1,000pcs depends on envelope size.

Envelope Manufacturing tolerance

Normal machinery variances in the envelope manufacturing industry are +/- 2mm. This occurs because as machinery runs, it heats up, and metal expands. In addition, normal wear in cylinders and bearings can cause subtle variations in cutting location and folding scores. As a result, your envelope may be ever so slightly larger or slightly smaller than you ordered.

How long can i get my order?

We endeavor to dispatch all our parcels within 1 to 3 working days with our courier for local orders. Our standard production lead time for custom made mailers within 30-45 working days. Any enquiries please email to contact_us@winpaq.com

Envelope size and weight Guide

Ideal for mailing greeting cards, regular letters and postcards, the maximum size that would fall under a 'letter' is 165 mm x 240 mm. We would recommend using an envelope no larger than C5 to fit these restrictions comfortably and avoid any excess costs. The envelope and contents must also weigh under 100g. Recommended envelope sizes (4.5inch x 9.75inch, DL Envelopes, C7, C6, C5, 5x7) For large letters, C4 envelope is a good choice. Others extra large envelopes (10 x 13, 10 x 15, 12 x 16, 13 x 18)

Do you have any Question?

Please fill the enquiry form below. We will get back to you shortly by email. Thank you.