Padded Envelopes

Padded Envelope Sizes: A Complete Guide

Choosing the right padded envelope size helps protect your items in transit and keeps your postage costs down. Our range runs from Size A (110 x 165mm internal) up to Size K (350 x 470mm internal), covering Royal Mail letter, large letter, small parcel and medium parcel thresholds.

Here is a quick overview of the most popular sizes and what they are best suited for:

Size A (110 x 160mm) fits gift cards, jewellery, cosmetics and other small items. It falls within Royal Mail’s letter rate (up to 100g), making it one of the most economical options for lightweight items.

Size C (150 x 215mm) is ideal for A5 documents, photographs, cards, wallets and smaller stationery items. Also, within the letter rate.

Size F (220 x 330mm) comfortably holds A4 documents, magazines, pads and books. It sits within the large letter threshold (up to 750g), making it a popular choice for e-commerce sellers despatching flat or lightweight items.

Size H (270 x 360mm) and above move into small parcel territory. These larger padded envelopes are well suited to clothing, craft supplies, photo frames and bulkier items that need cushioning.

The full sizing table below shows every size we stock, alongside the internal dimensions, available colours and Royal Mail classification.

Padded Envelopes for E-Commerce and Business Despatch

Padded envelopes, sometimes also known as bubble envelopes or jiffy bags, are a staple of e-commerce despatch. They are lighter than postal boxes, quicker to pack, and the built-in bubble lining provides enough cushioning for most items without the need for additional void fill or wrapping.

For online sellers despatching through Amazon, eBay, Etsy or their own website, padded envelopes offer a practical balance of protection and cost. A Size A or Size B envelope will comfortably ship jewellery, phone cases or cosmetics at letter rate, while a Size F or Size G can handle books, clothing or A4 documents at large letter rate. That keeps postage costs low and packing times fast.

For higher volume despatch, we offer bulk pricing across the full range. All stock is available for next day delivery.

Gold and White Padded Envelopes

We stock our padded envelopes in two colour options: gold (buff/manilla) and white. Both use the same bubble lined construction and peel and seal closure, so the choice is largely down to preference and presentation.

Gold padded envelopes are the traditional choice. They are well suited to general business mailings and internal despatch where appearance is secondary to function. White padded envelopes offer a cleaner, more professional look and are often preferred by e-commerce businesses that want their packaging to reflect their brand. Both options are available across the full size range from A to K.

Eco-Friendly Padded Envelopes

If sustainability is a priority, our Eco Padded Envelopes from Enviroflute offer the same level of postal protection without the environmental compromise of traditional bubble lined envelopes. They are fully recyclable as standard paper waste, biodegradable, plastic free and water resistant, making them a responsible choice for businesses looking to reduce their packaging footprint.

Our standard padded envelopes also have strong environmental credentials. They are made using FSC accredited paper and can be recycled once the bubble lining is separated from the outer envelope. Both options are a meaningful step towards more sustainable business packaging.

Why Buy Padded Envelopes from Forms Plus?

Forms Plus have supported businesses with their printing and packaging requirements since 1981. We stock padded envelopes across the full-size range in both gold and white, available for fast despatch. Our pricing is competitive and transparent, with further discounts available on larger orders.

We also supply a full range of complementary products, including Board Backed Envelopes, Postal Boxes and Packing Tape, so you can keep all of your packaging supplies in one order.

Request a Free Sample or Contact Our Team if you would like help choosing the right size or quantity for your needs.

Padded Envelopes Comparison Chart