So, the other day I got thinking, just out of the blue really, about baseballs. Specifically, how many seams are actually on one? It sounds simple, right? But I honestly wasn’t sure.

My first thought, you know, just guessing, was maybe two? Or perhaps four? It kinda looks like there are distinct sections. I mean, you see the stitching going around in that typical pattern.
Getting Hands-On
Couldn’t leave it alone, so I went and grabbed an actual baseball I had knocking around in the garage. Held it, turned it over. You see all that red stitching, right? That iconic double stitch making that sort of wave pattern all around the ball.
I tried to count what looked like separate seams. Following one line of stitches… but then it curves and seems to connect to another part. It got confusing pretty fast. Was this one seam or was that another one starting? My initial guesses felt wrong.
Figuring it Out
Then I stopped focusing just on the stitches themselves and looked at the actual construction. The cover is made of leather, right? And you can see it’s basically two pieces of leather. They’re cut in this sort of curvy, peanut-shell or figure-eight shape.
So, I put my finger right on the edge where the two pieces of leather meet, right underneath the stitches. And I started tracing that line. Just followed it all the way around the ball.

And here’s the thing: it just kept going. It looped all the way around and came back to where I started. It never broke. It was one continuous line where those two pieces of leather are stitched together.
So, technically speaking, there’s really only one seam on a baseball. It’s the single place where the two cover pieces join up.
Now, people always talk about “the seams” in plural, usually meaning the raised area caused by the stitches, which pitchers use for grip. And yeah, visually, with that double stitch pattern, it totally looks like multiple seams looping around. But trace the actual meeting point of the leather? It’s just one long, winding path.
The number of stitches in that seam is a whole other story – apparently, there are exactly 108 double stitches, making 216 individual stitches. Didn’t count those myself, seemed like too much work, but that one continuous seam thing? Yeah, figured that out just by tracing it. Kinda neat.