Age is just a number—and underestimating it is your mistake. The “Assuming I’m Just an Old Man Was Your First Mistake” t-shirt is perfect for men who still have plenty of fight, fire, and humor left in them. Strong, witty, and unapologetic, this tee makes a statement without saying a word.
Crafted from a soft cotton blend with a relaxed unisex fit, it’s comfortable enough for everyday wear while still packing a punch. Great for casual outings, family gatherings, or just reminding the world not to judge a book by its cover. It also makes a fun gift for dads, grandpas, or any man proud of his age and attitude.
Soft, breathable cotton blend for all-day comfort
Unisex fit, great for men of all ages
A bold, witty tee for men who refuse to be underestimated.
| Size guide |
S |
M |
L |
XL |
2XL |
3XL |
| Length (inches) |
28 |
29 |
30 |
31 |
32 |
33 |
| Width (inches) |
18 |
20 |
22 |
24 |
26 |
28 |
| Chest (inches) |
34–37 |
38–41 |
42–45 |
46–49 |
50–53 |
54–57 |
