Sisi is a stiffened polyester vertical-blind fabric offered by two UK retailers: Blinds By Post and So Easy Blinds. Both list it under the same name and carry broadly the same core palette - Cotton, Summer, Biscuit, and Dove - suggesting this is likely the same wholesale cloth offered through two different channels. So Easy Blinds adds a fifth option, Soft Grey, for buyers who want a cooler, more neutral tone.

Vertical blinds suit wide windows and patio doors better than most other blind types. The vanes rotate to control light and slide along the track to open, making them easy to operate across a large span. A fabric like Sisi, with a semi-structured feel typical of made-to-measure polyester vanes, handles daily use well and resists the slight swinging that lighter-weight fabrics can show in a draught.

Because the fabric is likely the same between the two retailers, the practical differences come down to three things: which colours each shop currently carries, what size range they cut to, and what you actually pay at the precise width and drop you need - not at the headline "from" price. The from-price difference between the two retailers is significant at first glance, but made-to-measure pricing scales with area, and the gap at a specific window size may be narrower or wider than the starting figures suggest.

Both retailers offer standard fitting only, so if you need a specialist mounting - face fix, top fix, or any specific bracket - confirm availability directly before ordering. Check the full price comparison below at your own dimensions to see which represents better value for your window.

Lowest at 1600×1200 mm: So Easy Blinds at £91.00. Enter your own size below to compare at the window you are buying.

Prices below are for a 1600×1200 mm window. Enter yours to re-rank - we round up to the next standard size, as the retailers do.

We match these on the shared name and a price that scales the same way across window sizes, not an independent inspection, so treat it as likely the same fabric rather than confirmed. Construction, exact colourway and fitting can vary between retailers - check the specification at each before buying.

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