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Square Shade Sails installed
HIGHLOWHIGHLOW Twist the corners high/low for strength, runoff and that sculpted look.

Standard & custom square sails · Made in Phoenix

Square Shade Sails

Four equal sides and four anchors. A square gives the most shade per corner, and twisting two opposite corners high makes it stiff and sheds rain.

  • Commercial 95 HDPE shade cloth — up to 95% UV block (by color), 22 colors
  • Reinforced corners: stainless D-rings on standard sizes, Pro-Rig style rings on custom sails, sandwich brackets by special request
  • 3/16″ stainless perimeter cable in a sewn hem pocket
  • Curved (catenary) edges cut to tension without wrinkles
  • Turnbuckle or 4:1 pulley hardware available

Standard sizes ready to order: pick your color, add the hardware kit and check out. Need a different size? Use the custom design tool.

Standard or custom

Three ways to get a square sail.

Standard · AU-SQ0904

Square Shade Sail, approx. 9′ 4″ × 9′ 4″

Pre-patterned at this finished size (D-ring to D-ring). Pick a color, add the stainless hardware kit and order online.

$470 →Standard · AU-SQ1811

Square Shade Sail, approx. 18′ 11″ × 18′ 11″

Pre-patterned at this finished size (D-ring to D-ring). Pick a color, add the stainless hardware kit and order online.

$1,290 → Custom · finished dimensions

Built to your size

Tell us the finished sail size. We build it to that size within about 1″ per side, and the design tool shows how far apart to set your anchors.

Open the design tool → Custom · fit to attachment points

Stretched to your points

Measure post to post or bracket to bracket. We pattern the sail smaller for hardware and tension; the design tool shows the finished size and the wire kit.

Open the design tool →

Standard sizes: Sizes are approximate, measured D-ring to D-ring; allow about 1″ either way. They’re the largest sizes that cut from a 3.0 m (118″) wide roll of Commercial 95 with little waste. Every edge takes a 0.5″ hem plus a 2.5″ cable pocket (3″ per edge), and a seam takes 2.5″. The small square, the small equilateral triangle and both rectangles are a single width of fabric with no seam; the large square and the large equilateral triangle are two widths joined by one seam. All eight standard sails.

We pull each corner in from its attachment point by the length of the hardware — about 10″ for a turnbuckle or block and tackle, 2″ for a direct connect — then make the sail 5% smaller so it stretches tight, and cut each edge with a curve about 5% of its length deep. So a 16′ finished square wants anchors about 18′ apart, and anchors 16′ apart make a square sail about 14′ 1″ per side (with tensioners at every corner). See the planning guide and field dimensions.

Common questions

Square Shade Sails FAQ.

Do you sell standard square sails?
Yes. We sell two standard square sails, pre-patterned at a finished size: approx. 9′ 4″ × 9′ 4″ and approx. 18′ 11″ × 18′ 11″. They’re two of our eight standard sails. They’re the largest sizes that cut from a 3.0 m (118″) wide roll of Commercial 95 with little waste. Every edge takes a 0.5″ hem plus a 2.5″ cable pocket (3″ per edge), and a seam takes 2.5″. The small square, the small equilateral triangle and both rectangles are a single width of fabric with no seam; the large square and the large equilateral triangle are two widths joined by one seam. Any other size or angle is a custom sail, made to the finished size you give us or fit to your attachment points.
Finished dimensions or fit to my attachment points — which should I choose?
Start with your attachment points: measure point to point and the design tool patterns the sail smaller so it stretches into that space with room for hardware and tension. That’s what most people want. If you need the sail itself to finish at your numbers, check Make it exactly these dimensions: there’s no stretch allowance, every corner is a direct connect, and you set the anchors to suit.
How accurate is a finished-size sail?
We build to the finished dimensions you give us within about 1″ per side. Your anchors need to sit farther out than the sail. We pull each corner in from its attachment point by the length of the hardware — about 10″ for a turnbuckle or block and tackle, 2″ for a direct connect — then make the sail 5% smaller so it stretches tight, and cut each edge with a curve about 5% of its length deep. So a 16′ finished square wants anchors about 18′ apart, and anchors 16′ apart make a square sail about 14′ 1″ per side (with tensioners at every corner).
Should a square sail be twisted?
Yes. Set two opposite corners higher than the other two so the fabric forms a saddle shape (a hypar). It stiffens the sail, sheds water and handles wind better than a flat sail. For a twisted or out-of-square sail, choose “4-corner, any shape” in the design tool and give us the diagonals. Field dimensions guide.
How long until it ships?
Every sail is cut and sewn to order in Phoenix, standard or custom, with a lead time of 7–10 business days. We confirm your ship date when we confirm your order, and rush production is available — call if you have a deadline.
Can I return a sail?
Every sail is cut and sewn to order, standard sizes included, so our policy is that we don’t accept returns. In rare cases we may accept an unopened, unused sail at our discretion, with return shipping at your expense and restocking fees. See our Returns Policy. Please double-check your measurements and color before ordering — we’re happy to review them with you by phone.

Start a shade project

Have a photo of the space?

Send it with your measurements — we’ll recommend standard or custom, the corners and the hardware.

Phone(480) 399-7516
Emailinfo@americanupholstery.us
Shop4970 N 7th Ave, Phoenix, AZ 85013
Get a shade quote
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