How to price blinds by width and drop on Shopify

Updated 4 November 2026 · Trimsize

Why blinds are priced by table

A roller blind's cost isn't just its area: a wider blind needs a stronger tube and bracket, a longer drop more fabric and a bigger roll. Suppliers price in bands, for example every 300 mm of width and drop, and send a table per fabric group. Retyping that as a formula loses the supplier's numbers; a table keeps them exact.

Variants can't hold it either: five widths, four drops and three fabric groups is already 60 prices to maintain by hand, and customers measure to the millimetre.

How a size table works

Each size in the table is the largest size of its band. A customer's size rounds up to the first band it fits. With these example prices for one fabric group, in millimetres:

A blind 1000 mm wide with a 1650 mm drop rounds up to the 1200 width band and the 1800 drop band: $211.92. A blind exactly 900 × 1500 is on a band and costs $175.20. Sizes beyond the last band can't be ordered, so the largest blind you make is the table's largest cell.

Extras on top of the table

Fixed extras like a motor are added first, then percentages like a lining, so a lining priced as a percentage applies to the motorised price too. If your supplier charges the lining on the blind alone, price it per area instead. Control side (left or right) is a choice with no price.

Getting the supplier's table in

1. Open the supplier's price list in Excel or Google Sheets.
2. Select the table with its sizes: widths along the first row, drops down the first column, prices in between.
3. In Trimsize, on the product's Pricing tab, choose the fabric group and click Paste from a spreadsheet.

Headings like 1501–1800 or Up to 1,800 read as the band's largest size, and prices can be written 1021.20, $1,021.20 or 1.021,20. A price of 0 isn't accepted, so a size your supplier doesn't make never sells for free. Full details: Price tables.

Set it up with Trimsize

1. Install Trimsize and, under What do you make?, choose Blinds & curtains and your product. It opens with a price table ready to fill, in millimetres, with three fabric groups, a control side, motorising and blackout lining.
2. Paste each fabric group's table and check a few sizes in the live preview.
3. Set your extras' prices, and add any others: chain colour, bottom bar, cassette. See Add-ons.
4. Show fabrics as swatches so customers pick by colour. See Tiles, cards and swatches.
5. Add the block to the product page and place a test order.

Common mistakes

• Rounding down. A 1000 mm blind belongs in the 1200 band, not the 900 band. Trimsize always rounds up.
• Different bands per fabric. Paste every fabric group on the same widths and drops, so each size has a price in each group.
• Leaving the largest band open. Customers can't order beyond your last band, which is what you want: set it to the largest blind you'll make.

Questions