Ordering bar chairs is mostly a matter of deciding three numbers and then refusing to let anyone change them quietly. Here is what those numbers are, and where the specification usually slips.
The four numbers that actually matter
A bar chairs drawing carries a dozen dimensions. Four of them decide whether the piece works in the room: 450 mm at a 750 mm table, with a back 380 to 420 mm above the seat.
The rest — radius, taper, grain direction, stitch spacing — are manufacturing detail. They matter to the workshop and to the price, but they cannot rescue a piece that is the wrong height for the counter it stands beside.
Why seat height is not a preference
The working gap between a counter top and a seat is 300 mm, with a usable band of 250 to 350 mm. Outside that band the guest compensates: compressing the thigh below it, lifting the shoulder above it. Neither shows up in a photograph, and both shorten the second round.
This is why the height has to be settled before the frame is chosen. Once the seat height is fixed, the structure has to deliver it, and no footrest, because the feet reach the floor at this seat height. Changing the height later moves everything downstream.
The numbers suppliers leave out
Three figures rarely appear on a quotation. The first is the load case: a 150 kg whole-chair static load, tested with the back in place. The second is the finished weight, which decides what a delivery actually costs to move through a door and up a stair. The third is the packing footprint per unit, which decides how many you get in a container.
Ask for all three in writing. Suppliers who answer instantly are working from a measured product; the ones who come back tomorrow are working from a catalogue photo, and the difference shows up at installation.
Reading the drawing against the room
Take the finished floor level, not the slab. Tile, screed and underlay can move a floor by 20 mm, and that 20 mm lands directly in the gap between seat and counter.
Then check the overhang. Where the counter has 250 mm of overhang, the seating tucks under and the geometry works. Where it has none, the guest leans forward, and the correct seat height stops being enough on its own.
What to write on the purchase order
Write the test rather than the number: whole-unit static load, applied to the seat and back assembly, with a stated pass criterion. Write the seat height in millimetres, not the product category, because category names vary between factories.
Our own drawing set for bar chairs carries these figures as standard, and the quality and compliance are quoted against the room rather than against a stock size.
Where these figures can be checked
Every figure above can be checked before an order is placed. The bar chairs pages carry the dimensions, including custom heights, and the finish range is set out under materials and finishes.
Load and material reports sit alongside each other in quality and compliance rather than in separate documents, and the route from approved drawing to packed crate is described in how we work.
Where a room mixes heights, the poseur tables are usually the piece that gets specified last and fits worst, so settle them in the same drawing round.
Questions buyers ask
Which dimension should I confirm first?
The seat height, because everything else follows from it. 450 mm at a 750 mm table, with a back 380 to 420 mm above the seat
Is the load rating on a quotation comparable between suppliers?
Only if both state the same test. a 150 kg whole-chair static load, tested with the back in place — a seat-only figure and a whole-unit figure are not competing numbers.
Do I need the finished weight before ordering?
Yes, for two reasons: handling on site and the freight calculation. It is rarely on a quotation and always available from a factory that has measured its own product.