How to Decorate Pen Pal Letters with Washi Tape

Washi tape can make a pen-pal letter feel personal without turning it into a complicated craft project. Use it to frame a note, secure a paper belly band, or add a small detail to an envelope. The key is to keep decoration clear of the address, postage, barcode area, and any part that needs to be handled by postal equipment.

Choose a simple design before you start

Pick one visual direction: a botanical border, a repeated colour, or one accent strip with a small matching detail inside the letter. Limiting the palette to two or three colours helps the envelope look intentional and leaves the handwriting easy to read.

Three easy ways to use washi tape

Frame the letter, not the writing

Add a short strip along the outer edge of the note or across the flap of an inner paper wrap. Leave a clear margin around the text so the decoration does not compete with your message.

Make a paper belly band

Wrap a narrow strip of paper around a folded letter or a small bundle of memo sheets, then use a short piece of tape to hold the paper in place. This keeps the tape off the letter itself and makes the bundle easy to open.

Add one envelope accent

Place a small strip on the back flap or an unused corner. For an envelope that will travel through the post, do not cover the recipient address, return address, postage, or a broad central area where sorting marks may be applied. When in doubt, keep the outer envelope plain and decorate the note inside.

Layer tape neatly and test first

On a spare piece of the same paper, check how the tape lifts and whether ink smudges. Tear or cut a short piece, press it down gently, and add a second strip only where the pattern needs overlap. Avoid stretching the tape; tension can make the edges lift. For delicate or coated paper, place the tape on a removable paper band rather than directly on the letter.

Make a small pen-pal stationery kit

One or two coordinated rolls, a pen, and a few paper inserts are enough. The Premium Gold-Foiled Washi Tape Gift Set has floral designs with gold foil and is listed in the Stickers & Washi Tapes collection. See the real product photo below. For other paper-based ideas, explore our washi tape journal ideas and creative journaling guides.

Before you mail it

• Keep all addresses and postage fully visible.
• Do not use tape as the only seal on an envelope that may be handled heavily.
• Check that no loose edge catches when you slide the envelope into another sleeve.
• If mailing internationally, follow your postal service’s rules for size, weight, and prohibited inserts.

FAQ

Can I put washi tape on the outside of an envelope?

Yes, but keep it away from addresses, postage, and likely sorting areas. A small accent on the back flap is a lower-risk choice than covering the front.

Will washi tape damage a handwritten letter?

Adhesion varies by paper and tape. Test on a scrap first, especially with thin, textured, or coated paper; a paper belly band is a safer option for keepsake letters.