Check a greeting-card envelope before posting

Measure the complete envelope

Place the finished envelope on a flat surface and measure its longest and shortest sides. Check the thickest part rather than only a thin edge. A raised decoration or several overlapping inserts can affect the result even when the card itself is small.

Compare the measurements with the current official service limits. Don't force a bulky envelope through a guide to make it appear eligible. If you are uncertain, ask at an appropriate postal counter or use the provider's approved checking process. The purpose is to choose the correct service for the actual item, not to fit it into the category printed on an old shopping list.

Check weight and contents together

Weigh the sealed item using a suitable method, including the envelope and all inserts. Check the current weight band and the permitted contents for the destination. A greeting-card article can't establish that every small gift is accepted in ordinary letter post.

For anything valuable, sensitive or restricted, consult the provider's current service and contents guidance. Don't put important personal information where it can be read through a window or a thin envelope. If the card includes cash or another item needing special handling, choose a service based on the provider's specific advice rather than assuming that a thicker envelope adds the protection you need.

Keep the address easy to read

Follow the postal provider's address format for the destination, including the postcode or relevant international details. Put the address on a clear area of the envelope and keep decorative writing away from information needed for delivery. Check the recipient's details before sealing if there is any uncertainty.

Choose an envelope closure that stays secure under the provider's guidance. Loose ribbon, projecting decorations and unusual shapes may need a different outer package or service. Don't cover postage or routing areas with a gift label. A simple outer envelope can protect an elaborate card while leaving the information needed for delivery readable and unambiguous.

Choose the service using current information

Check Royal Mail's live size and weight guide and the service details on the day you arrange postage. Prices and seasonal deadlines can change, so avoid treating an older receipt or saved screenshot as the current answer. Read what a delivery estimate or tracking feature actually means for the selected service.

Keep the receipt where appropriate, especially when the provider supplies proof of posting. Tell the recipient separately if they need to expect something important. The useful outcome is a correctly addressed, appropriately packaged item sent using the right current service. Choosing the envelope before adding the card's extras can leave the most important check until it is too late to change the packaging easily.

Your next steps

• Check the exact model or source instructions for your own setup.
• Keep the original retailer link and compare the complete usable purchase before paying.

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