We've seen a lot of washi tape on Apartment Therapy, but I'll admit it: I just cannot get enough. Whether you are renting, thinking of moving soon, or just don't want to invest a lot of time, energy, or resources into your wall art, a washi tape wall wonderland just might be in order.
Warning: The following images may result in overconsumption of and an unrelenting fascination with washi tape!
TOP ROW:
1. Design*Sponge
2. The Petite Soiree
3. Red Ted Art
4. Sunshine of Mine
5. French by Design
BOTTOM ROW:
6. All Washi Tape
7. Restless Oasis
8. Babble
9. J.Crew Holiday Catalog via The Pink Chalkboard
MORE WASHI TAPE IDEAS ON APARTMENT THERAPY:
• Office Revival: Decorating with Washi Tape Pencil Shavings
• A Washi Tape Toy Car Track
• Washi Makeover: 5 Ideas For Decorating with Washi Tape
(Images: as linked above)
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The Big Book of Small, Cool Spaces 
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The Eight-Step Home Cure 
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I suppose you ca find some suitable uses for this stuff, but it still looks like tape stuck on the walls. These are some creative ideas, but I would not use it myself.
Why would any coloured tape not work just the same?
I agree with JamieO2. The tape lends it the feel of a teenager's room decor.
I feel like I went to sleep for ten years and woke up and washi tape was everywhere.
Isn't this the same site that decided vinyl decals were trashy and passé?
I have seen really great washi tape ideas but none of these specifically were interesting me.
All of these look childish and cheap. Sorry.