Show off your love of mathematics with this unique t-shirt. The design features the square root of 100, followed by the phrase 'years old,' making it a clever and humorous way to celebrate a 10th birthday, or as a math pun. The shirt appears to be a comfortable black tee, suitable for everyday wear. This shirt is an awesome gift for math enthusiasts and anyone with a sense of humor. Whether you're heading to school, a casual outing, or want to make a statement, this tee will get you noticed and spark conversations.