The first time I tried matching dining chairs and bar stools, I didn't even think about the counter overhang. I just picked wood tones that looked good next to each other. Then I sat down and my knees hit the drawer pulls. The stool seat was 26 inches high, but my counter apron dropped down to 24 inches, so there was no room for my legs. That's the mistake, right there. It's not about color matching first — it's about seat height and the space under the table or counter.
Measure the seat height difference, then everything else
Get a tape measure. Sit at your table. Standard dining table is around 30 inches tall, so your chair seat should be about 18 inches off the floor. For a kitchen counter at 36 inches, you need a bar stool with a seat height around 26 inches. But if your counter is 38 inches (some islands are taller), you'll want a stool at 28. That's the rule I keep coming back to: the seat height should be roughly 10 to 12 inches below the table or counter surface. You can also just measure the distance from the floor to the underside of the counter. If that's less than your stool seat, you're going to be stuck.
The under-counter clearance nobody talks about
So you've got the stool height right, but there's still the matter of the overhang. You need at least 8 inches of overhang for your knees, and ideally 10. I had a bar stool with arms that fit height-wise but the arms hit the counter lip. That was a $150 mistake. If you're mixing chairs and stools in the same room, keep the overall proportions similar — same visual weight, same seat depth, maybe the same wood color. But the one thing that will actually ruin the setup is clearance.
The color matching trap
Once you've got the heights right, then worry about wood tones and fabric. You can pair a walnut chair with a walnut stool and it'll look cohesive, even if they're from different lines. The trick is to compare them in the same light. I once bought a "honey oak" stain that looked almost yellow next to my table's golden oak. So bring a small wood sample or a photo of your table to the store, and if you're ordering online, order a swatch first.
When you can't find a perfect match
If you can't find the exact same chair and stool, don't panic. You can use one style for dining chairs and a different style for bar stools, as long as they share a material or a color. For example, all wood, or all with black metal legs. The eye will fill in the gaps if the proportions are consistent. I've seen rooms where the dining chairs were upholstered and the stools were wood, and it looked fine because the wood legs matched the table base.
In the end, the thing that decides whether your matching dining chairs and bar stools work is the seat height measurement. If you nail that, everything else is just styling. If you get it wrong, you'll be eating dinner with your knees in your chest. Measure twice, buy once. And maybe read a few more guides first — I found these helpful after my own mistakes: Pottery Barn Dining Chairs: First-Week Setup and the One Decision, IKEA Dining Chairs Set of 4: The Measurements I Wish I'd Taken, and More guides in Dining Chairs.