Hello Tory. I have just done the blinds thing. I have three windows which face the sun and contrary to pop opinion, ‘Normand Grey’, a cheeky name for one of Farrow & Ball’s’ ‘paint for toffs’ is not what we have here week in/week out. In fact I have the blinds down now, 'cos the current is doing that thing … 
There’s lots on Amazon. I went for white venetian blinds, 'cos I’m a bloke. A writer for The Independent spent a week as a cleaner in London and noted 1] All the blokes had venetian blinds - curtains too girly 2] Everybody had those large globular paper lampshades. [It was that era]
If a blind has brackets that attach horizontally [as opposed to vertically, as in a window recess] they will fit on the window frame. And I reckon they all do.
If by some strange quirk the blinds with which you have decided you cannot live without, you love them so much, you could fit them on a vertical bracket by first adding a batten to the window frame. This would bring the blind out from the window by the width of the batten, of course, but as far as I’m concerned, when it come to blinds and windows in France [as opposed to French Windows] that’s the least of the problems.
Rant coming — I have asked a French engineer, now retired and doing a lot of building on his gite, on his house, on his late mother’s house, “Why do all windows in FR [and ES and elsewhere for all I know] OPEN INWARDS!?” My friend said he had no idea.
It means that if you have a window cill, you can’t put anything on it and be able to open the window. In my case, my kitchen table is up to the window and I can’t open the window without sweeping half the stuff on the table onto the floor. The wind has done this for me - just the once.
It means you cannot have anything like blinds or curtains AND have the window open. Well, you could if the blind/curtain is mounted on the window frame but that defeats the object of the exercise, don’t it?!
As these open-inwards windows do not have stays, you can’t have the window open a crack - esp useful at night.
This is the result of having the window open with venetian blinds fitted to the wall above.
If mounted on the wall, you have to calculate how much depth to allow for the slats when they are bunched up, closed. Otherwise you have the top of the window fouling the bottom layers of slats. This has to be factored in to the drop of the blind when you order it. There has to be enough slats to completely mask the window - there must be enough drop to do this and be able to mount the blind high enough above the window so the top of the window does not catch the bottom of the blind.
If the window opened outwards none of this would matter!
When I lived on the Med coast of Spain, the windows had massive roller blinds, slats of 19 x 25mm that rolled down over the window aperture and the window open on the inside. This makes sense in countries where keeping the sun out all day long but having some breeze into the room is the norm.
And the irony - or stupidity, more like - is that my windows had these massive blinds but the sun never shone on my side of the narrow alley!
And of course being able to close shutters whilst the window is open. But that really only applies in climates of constant intense light and heat. It makes no sense north of the Loire, say. My engineer pal had lovely blue shutters on his gite [Manche] window
They had evidently never been closed! The paint on the ‘inside’ [ie what you see here] was peeling and the batten at bottom of the right window fell off with rot. The paint on what would be the outside when closed was as if painted last week!
Nothing to do wth windows and blinds but … the lovely blue door. That has been replaced by
The Air BnB’ers won’t mind.
matbe no one else knows either 
