Vintage ribbed weave cotton fabric from the 50s (ish) era. White cotton background with an navy or dark blue even grid or check print that has tiny red squares where some of the lines intersect. I'm getting an arcade or video game vibe from this print but the fabric is WAY earlier than the 80s. 100% cotton, medium weight.
 
Measures 140" (3 yd 32") length by 35" width
 
Pre-owned, unused vintage fabric has not been washed or pre-shrunk; clean as-found.