botts dots
They are the raised reflectos that are on the white lines on the highway. Botts' Dots are named after their inventor, Elbert Botts, a chemist who worked for Caltrans in the 1950s because painting the lines every year was very expensive and dangerous.
The Urban Dictionary Tee

Happy that this tee is comfy and fits well. I wish the sentence was on the back too.
My wife absolutely loves her new T-shirt.
This looks like a weird design but it looks cool
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|---|---|
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Size Guide
Measurements may vary by up to 2" (5 cm). Pro tip: Measure one of your t-shirts at home and compare!
A - Length
Measure from the top of the collar to the bottom hem
B - Width
Measure across the chest from armpit to armpit
Size Chart
| Size | Length | Width | 
|---|---|---|
| XS | 27" | 16½" | 
| S | 28" | 18" | 
| M | 29" | 20" | 
| L | 30" | 22" | 
| XL | 31" | 24" | 
| 2XL | 32" | 26" | 
| 3XL | 33" | 28" | 
| Size | Length | Width | 
|---|---|---|
| XS | 69 cm | 42 cm | 
| S | 71 cm | 46 cm | 
| M | 74 cm | 51 cm | 
| L | 76 cm | 56 cm | 
| XL | 79 cm | 61 cm | 
| 2XL | 81 cm | 66 cm | 
| 3XL | 84 cm | 71 cm |