"Custom blinds" means two things in South Africa: a blind built to the exact size of one window, and the specialists who make them that way. Both matter, because the entire value of a custom blind is the fit. A ready-made blind is sold in fixed widths; if your window falls between sizes you either trim a product never designed to be cut, or you live with gaps of light down the sides.
A made-to-measure blind is built from your own width and drop. Every opening is measured separately because wall openings are rarely perfectly square, and a few millimetres is exactly what a custom blind absorbs. The fabric and opacity, from sheer through light-filtering to blockout, are chosen at the same time, along with the control side and any motorisation.
Most roller and no-drill systems arrive ready to fit, so a great many South African homes now order online and mount the blinds themselves. No-drill systems in particular suit renters and tiled or face-brick reveals where drilling is not an option. Pricing is driven by size, fabric and extras, and is calculated from the exact measurements rather than rounded to a shop size.
For the full breakdown of types, measuring and nationwide delivery, see blinds cut to your exact window.