The most t-shirts worn at once is 260, and was achieved by Ted Hastings (Canada) in Kitchener, Ontario, Canada, on 17 February 2019.
The idea came after Ted was looking through Guinness World Records 2019 with his children, Avery, 14, and William, 11, when his young son asked him whether he could set an official Guinness World Records title.
Seeing this as a great opportunity to teach his children an important lesson about hard work, commitment, and follow through, Ted replied optimistically and set out to transform this idea into a reality.
Ted wore shirts ranging from medium up to 20X to break the Guinness World Records title, and hoped to raise money for a school playground.