The Sisi range from Blinds By Post is a made-to-measure vertical blind offered in 4 colourways, starting from £11.93. It is a small, neutral-led collection: four soft light-filtering shades in a single hanging-louvre cloth, aimed at wide windows, patio doors and conservatories where a vertical suits the opening better than a roller or roman.
Who it suits
A vertical blind hangs in fabric louvres that tilt to control light and draw to one side to clear the window, which makes it a natural fit for wide aspects, patio doors and conservatories. The louvres rotate so you can angle daylight and privacy without fully opening the blind, and they stack neatly aside when you want the opening clear. The Sisi cloth is light-filtering rather than blackout, so it softens incoming daylight rather than blocking it, and the four shades stay within a quiet neutral band that sits easily in most rooms.
Because vertical louvres overlap rather than seal, they always leak a little light at the joins, so this is not the blind for a room that needs full darkness. For a bedroom after blackout, a roller or pleated blind in a blackout fabric would do better. Sisi makes most sense on a wide window or a door, where the side-draw and tilt of a vertical are genuinely useful and the soft neutrals keep the look unobtrusive.
The colours
4 colours available
Sisi is a four-shade neutral collection: Cotton, a clean white; Dove, a soft grey; and the warmer neutrals Summer and Biscuit. Between them they cover the cooler and warmer ends of a neutral palette - a crisp white, a grey, and two softer tones - rather than spreading into stronger colours, so the choice is about which neutral sits best with your walls and floor rather than across colour families. That keeps the decision manageable while still giving more than a single tone to work with. Neutral louvres in particular read differently under daylight and lamplight and across a wide run of slats, so a shade that looks right on screen can shift once it fills the window, and ordering samples is worth doing before you commit.
Price by your dimensions
Enter your window size. We round up to the next standard size, which matches how the retailer actually quotes you.
Price down 3% since 13 Aug. (our checks since 6 Jun)
The standard fitting starts from the entry price shown above, a modest starting point for a made-to-measure vertical. The price for your window depends mainly on its width and drop, and because verticals are often specified for wide openings, the figure for a full patio door will sit well above the headline from-price. Check the figures above against your own measurements rather than relying on the starting price.
How it compares
Against a roller or roman, a vertical handles wide windows and doors far better, drawing to the side and tilting where a roller only raises and lowers. The trade-off is light leak: the louvre overlaps mean a vertical never reaches the clean blackout a roller can, and Sisi's cloth is light-filtering in any case. Against a venetian, the vertical hangs its slats vertically rather than horizontally, which suits tall and wide openings and doorways where a horizontal stack would be awkward. Within verticals, Sisi is a small neutral set rather than a wide palette, but it covers the colours most rooms want from a vertical.
A note on care
Vertical louvres are simple to maintain and, usefully, individually replaceable - if one is damaged you can swap the single louvre rather than the whole blind. Keep them dust-free with a soft brush or a vacuum on a low setting, running down each louvre rather than across. Spot-clean marks with a damp cloth and a mild detergent, testing on a hidden louvre first, and let the fabric dry fully before tilting the blind closed again.
Likely the same fabric, at other retailers
Sisi vertical blinds are sold under the same name by more than one UK retailer, and the price scales identically across window sizes - a strong sign it is the same fabric from the same supplier:
- Blinds By Post this page from £11.93
- Blinds Direct from £43.20
- So Easy Blinds from £51.57
- Vertical Blinds Direct from £71.50
- Wilsons Blinds from £71.50
We match these on the shared name and an identical price curve, not an independent inspection, so treat it as likely the same fabric rather than confirmed - and check the specification and colour at each retailer before buying.