Where can I get an invoice for my order from?

Firstly, thank you for purchasing from us. We really do appreciate it. Downloading an invoice is simple, please follow the few steps below:

1. Log into your account on our website, using your user name and password.
2. At the top of any page on our website, you will see a tab called 'My Account', click on it.
3. Once you are into your account, you will be presented with a few more options. Please click on 'My Orders'.
4. Within this page you will see all your past and present orders you've placed with us, with the ability to download a PDF or Web Invoice.

If you do not see your invoice within your account please do get in contact with us, we are only too willing to help. To get in contact with us, please look in the bottom left hand side of any page on our website.

What is your returns policy?

At Ideal Envelopes Limited we want you to be delighted every time you shop with us. Occasionally though, we know you may want to return items.

If for any reason you are unhappy with your purchase you can return it to us in its original condition within 10 days of the date you received them (with any seals and shrink-wrap intact) and we will issue a full refund for the price you paid for them. This does not apply to bespoke cut and made items, see details below:-

Please Note:

  • We can only accept opened items if they are faulty.
  • Postage will only be refunded on goods which are faulty.
  • Maximum postage refunds are limited to £6.50 per parcel, which must be agreed in advance before parcels are returned.
  • If you find some/all of your items are faulty/damaged, please make sure you let us know within 7 days of delivery, otherwise this can not be rectified later. No exceptions will be made.
  • Card blanks, cut paper and card including A5 and A3 sizes are a bespoke made and cut for customer orders. These are none refundable and non returnable. You can request a sample before hand to make sure the card or paper is correct for purpose and use. Paper and card is cut to + and - 1 mm tolerance.
  • The onus and responsibility is with the customer to ensure the goods are returned in a proper and resale able condition. Damaged incurred to goods by customers carriers, will be the customer responsibility and no refund will be issued.
  • Items from orders must be returned in full, we can not accept part pack returns.
  • Goods should be returned in suitable and adequate packaging, as to protect the product/goods from the rigors of the postal or carrier system.
  • Items returned in an unfit and un resaleable condition will be disposed of at Ideal Envelopes discretion. Photographic evidence will taken. Ideal Envelopes will not return the damaged or unfit goods.
  • Ideal Envelopes or any of its sister web sites or associated companies will not enter into disputes and claims for damaged goods with customers or third party carriers.
  • Goods to be returned from overseas destinations will be at the customers expense, unless goods are faulty, for this reason we always recommend that customer email and request a quotation for an overseas sample, the sample we will only charge the Royal Mail current postal rate.

Envelope Manufacturing Tolerances

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.

What is GSM?

What does GSM mean?

You may have noticed that envelopes are supplied in a range of different GSM. This is also true of paper and card, but what does this mean?

What does GSM mean?

GSM stands for 'Grams Per Square Meter' and means the amount of grams a single sheet of paper weighs measuring 1m x 1m.

Paper that is used to manufacture envelopes generally start at thin 70gsm all the way to up to a much thicker 180gsm paper. A lower gsm paper, such as 30 - 60gsm, would be used for something like newspapers but is much too thin to enclose anything without it becoming torn. Higher GSM envelopes such as 130gsm are much thicker and higher quality which makes them popular for use as wedding invitations. You can see the table below which shows the GSM and common uses.

GSMCommon Uses
70 - 90gsmBusiness Envelopes to enclose letters, thin documents. These envelopes are generally cheap.
90gsm - 100gsmAverage envelope that is used to send through the postal system.
110 - 130gsmPremium envelope that are popular as use for wedding invitations or greetings cards envelopes.
140 - 180gsmThick envelopes that are very sturdy and protect it's contents.

An envelope is the first thing that you see and can help improve deliverability, increase open rates, promote offers and communicate a positive brand image. Simply by using a coloured envelope over a plain white envelope can increase open rates by nine times! You can communicate a positive brand image further by having your brand printed onto an envelope of your choice!

How to Address an Envelope in the UK

In order to get your letters and mail delivered to the correct address as quickly as possible, you need to ensure you address your envelope in the right format.

Addressing your envelope

  • Left align the name and address of the recipient.
  • Use neat handwriting that is easily readable or if printing the address, use a clear easy to read font (Avoid fancy fonts)
  • Make sure the colour of the address you use is clear. E.g black text on a white envelope, white text on a dark coloured envelope.
  • Leave enough space in between lines
  • Place the correct postage stamp or PPI (Printed Postage Impressions) in the top right-hand corner

Please see below an example of a correctly addressed envelope

How to address an envelope

Return address

Although not a requirement, it is good practice to add a return address to your mail in the event that it doesn't get delivered to the intended address. You can place the return address anywhere on the envelope but it is recommended to place this on the back of the envelope to avoid confusion with the delivery address.

Envelope return address

Are envelopes recyclable?

Recycled Envelopes

Yes, paper envelopes are recyclable and can be placed in your household recycling bin/box to be collected by your local council. However, envelopes with windows may not be completely recyclable due to the window being made of plastic. Although the plastic isn't able to be recycled, it can now be separated from the envelope easily at the paper mills. Another option would be to manually remove the window yourself.

Can envelopes with bubble wrap be recycled?

Envelopes with bubble wrap such as padded envelopes, jiffy bags or bubble bags cannot be recycled due to them being made of multiple materials (paper, plastic & other materials).

Where to buy recycled envelopes?

You're in the right place. We supply a range of totally recycled envelopes in a whole range of popular sizes and colours.

Shop Recycled Envelopes

Royal Mail Letter Sizes

Here you will find detailed information including sizes and costs for sending standard letters and large letters with Royal Mail.

Royal Mail Size & Weight Guide For Letters

Max Weight Max Length Max Width Max Thickness
Letter 100g 24cm 16.5cm 5mm
Large Letter 750g 35.3cm 25cm 2.5cm


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

Cost for sending a letter

Service Price
1st Class 67p
2nd Class 58p

Large Letters

For mailing contents such as A4 sized documents, DVDs, certificates, large greeting cards and magazines you would need to send as a large letter. The maximum size is 250 mm x 353 mm and and a maximum weight of 750g so a C4 envelope is a good choice.

Recommended envelope sizes for a large letter

Cost for sending a large letter

Weight 1st Class 2nd Class
up to 100g £1.01 97p
101g to 250g £1.40 £1.26
251g to 500g £1.87 £1.64
501g to 750g £2.60 £2.22