This black t-shirt features a humorous saying that's perfect for any grandpa. The design reads "Grandpa Knows Everything" in a mix of red, yellow, and green text. A witty phrase below states "If he doesn't know, he makes stuff up really fast." This tee is great for casual wear, family gatherings, or as a fun gift. The shirt has a classic crew neck and short sleeves. It is a comfortable and stylish choice for any cool grandpa with a sense of humor.