I Brake For Unicorns - Funny Bumper Stickers (Medium 10x2.8 in.) Size: Medium 10 x 2.8 inches. We offer hundreds of bumper stickers, each in 3 sizes! Many designs also available as Refrigerator Magnets. Digitally printed on recyclable 4-mil waterproof polypropylene. 30-day Satisfaction Guarantee.