Both of these stools are adjustable and would look rather sleek with your design. Beautiful kitchen by the way. One is a bit over your desired budget but may be worth it? Both from Wayfair. https://www.wayfair.co.uk/Bar-Stools-l59-c1804848-O86128~Grey.html Shannon

Hello Colourwise Design, Thought I would give you a visual of what I had meant. I have used Jonathan's drawing as I use sketchup personally for spatial drawings in 3D. However this means you get to see the same kind of view though with his design and scale. Also offers me the chance to show you how the materials can effect the overall appearance as I have deliberately chosen a material colour to blend with the flooring (or as close to so you can see what is solid) which can be done in a myriad of ways so things appear less solid and thus give a more open room configuration ... Have copied Jonathan's chairs which I have slid under a little more. So you have flow and a very simple configuration which does not hinder the exit to the garden which I think you will want to retain personally. So it could be that the first section houses sink, dishwasher. FF could be in left corner where room opens out? Hob could be at dining end. So cook and serve idea. This also allows for the additional room where the area widens. You still have flow between task oriented routes ie sink to ff and ff to hob etc. Making use of height with a single width double ff and perhaps considering a wall oven and some wall hung cupboards on that wall to the right of the image. The dresser might be able to situate to the right of the window on the left of the image. Down draft on hob or overhead extraction and ceiling hung pans or a section underneath hob for pans etc.. So this idea could either be solid with build in cupboards which I would propose have sliding doors or at dining end taper off into a table top.. Its a quick rework to show you what I had envisioned as I saw it. Re the door in to kitchen, perhaps consider a door that is sliding for example a pocket door. : ))

Out of all the ones you’ve listed I like the one from Perch and Parrow but I’m confused when you say footprint within 48x48cm and this one is listed as 42x42cm. Incidentally I found them cheaper here: https://www.costco.co.uk/Furniture-Home/Dining-Room-Furniture/Chairs-Bar-Stools/Gallery-Palmer-Brown-Faux-Leather-Bar-Stool-2-Pack/p/263151 Also found this one: https://www.wayfair.co.uk/furniture/pdp/selsey-living-hoker-65cm-bar-stool-tcdv2652.html?piid= And a bit of a wild card but the cantilever might make it extra comfy: https://www.argos.co.uk/product/8835576 Also have a browse in the Houzz shop. They have lots of barstools so you may find something there.

West Elm... they do Counter Stools (circa 65cm high) and bar stools (circa 75cm high)... we got a pair and they are well made.