A new made-to-measure mainsail for a 21 ft sailboat costs about A$1,306 including GST (US$807), and a 130% furling genoa about A$949 including GST (US$587). These are the median prices across 55 boat models of 21 ft, in Dimension-Polyant Optimum Cruise sailcloth.
Prices checked 21 October 2026. A$ prices include GST. US$ prices apply in the US and every other country.
New sail prices for a 21 ft sailboat
| Sail | Optimum Cruise (value) | C-Breeze (long life) |
|---|---|---|
| Mainsail, full battens | A$1,306 / US$807Most boats A$1,131 to A$1,464 | A$1,447 / US$894Most boats A$1,247 to A$1,629 |
| Furling genoa, 130% | A$949 / US$587Most boats A$745 to A$1,124 | A$1,067 / US$660Most boats A$838 to A$1,265 |
| Mainsail + genoa | A$2,250 / US$1,391Most boats A$1,997 to A$2,512 | A$2,510 / US$1,552Most boats A$2,224 to A$2,805 |
Median price across 55 boat models of 21 ft. “Most boats” is the middle 80%. Standard build of about 4 weeks. Shipping, and import duty for the US, are added at checkout.
Prices for popular 21 ft sailboats
Exact prices for 21 footers from the biggest production builders. Click through to choose your sailcloth, battens, genoa size and build time.
| Boat | Mainsail | 130% genoa |
|---|---|---|
| Beneteau First 21 | A$1,392 / US$860 | A$1,013 / US$626 |
| Jeanneau Sun 2000 | A$1,377 / US$851 | A$949 / US$587 |
| MacGregor 21 | A$1,306 / US$807 | A$845 / US$522 |
| Pearson 21 | A$1,312 / US$811 | A$937 / US$579 |
| Cal 21 | A$1,152 / US$712 | A$893 / US$552 |
| Islander 21 | A$1,286 / US$795 | A$932 / US$576 |
| Irwin 21 | A$1,214 / US$751 | A$877 / US$542 |
| S2 6.8 | A$1,124 / US$695 | A$1,109 / US$685 |
| Santana 21 | A$1,047 / US$647 | A$1,079 / US$667 |
| Dehler Delanta 80 | A$1,444 / US$893 | A$1,203 / US$744 |
Optimum Cruise sailcloth, full-batten mainsail, standard build.
What sets the price
- Sail area. Price follows the size of the sail, which comes from your boat’s rig (I, J, P and E). A typical 21 footer carries about 12.5 m² of mainsail and 12.6 m² of 130% genoa.
- Sailcloth. Both cloths are woven polyester (Dacron) from Dimension-Polyant, the German sailcloth maker. Optimum Cruise is the value choice for coastal and weekend cruising. C-Breeze is a tighter weave that resists stretch and holds its shape for longer, for sails that work hard or go offshore. At 21 ft we use Optimum Cruise 248 OC (6 oz) or C-Breeze 241 CB (5 oz).
- Battens. Full battens (4) hold the sail’s shape and help it last. The 3 leech + 1 full head batten option costs a little less.
- Genoa size. We make furling genoas from 110% to 150%. Most cruising boats carry about 130%; a smaller genoa costs less.
- Build time. Standard is about 4 weeks. Express (about 2 weeks) adds 8%; economy (about 8 weeks) takes 5.5% off.
What’s included
Mainsail: cloth weight matched to your boat, two reef points with low-friction rings, cunningham, stacked reinforcement patches, Dyneema leech and foot lines, battens, sail bag and a 12-month warranty.
Furling genoa: UV cover on the leech and foot, foam luff pad, luff tape to suit your furler, stacked reinforcement patches, sail bag and a 12-month warranty.
After you order, a sailmaker checks your measurements before anything is cut. If your numbers change the price, we tell you first and you can cancel for a full refund.
Questions
How much does a new mainsail cost for a 21 ft sailboat?
A made-to-measure cruising mainsail for a 21 ft sailboat costs about A$1,306 including GST (US$807) in Dimension-Polyant Optimum Cruise with full battens. That is the median across 55 boat models of 21 ft; most fall between A$1,131 and A$1,464. In the longer-lasting C-Breeze cloth the median is A$1,447 including GST (US$894). A main with 3 leech battens and a full head batten costs a little less than one with 4 full battens.
How much does a new genoa cost for a 21 ft sailboat?
A 130% furling genoa for a 21 ft sailboat costs about A$949 including GST (US$587) in Optimum Cruise, or A$1,067 including GST (US$660) in C-Breeze. Most fall between A$745 and A$1,124 in Optimum Cruise. A 110% or 120% genoa costs less and a 140% or 150% costs more.
How much does a new set of sails cost for a 21 ft sailboat?
A new mainsail and 130% furling genoa together cost about A$2,250 including GST (US$1,391) for a typical 21 ft boat in Optimum Cruise, or A$2,510 including GST (US$1,552) in C-Breeze. Shipping is added at checkout.
Why do sail prices vary between 21 ft boats?
Sail prices follow sail area, not boat length. A typical 21 ft boat carries about 12.5 m² of mainsail and 12.6 m² of 130% genoa, but a tall-rig or performance boat carries more, and a fractional rig has a bigger main and a smaller genoa. That is why we price every boat from its own rig dimensions (I, J, P and E).
What sailcloth weight does a 21 ft sailboat need?
We match the cloth weight to the boat's length using Dimension-Polyant's guide. For a 21 ft boat that is Optimum Cruise 248 OC (6 oz) or C-Breeze 241 CB (5 oz).
How we worked this out
We priced the mainsail and genoa for all 55 boat models of 21 ft in the Sails.Online catalogue, using each boat’s published rig dimensions and our standard build. These are the same prices you see in the shop. The median is the middle price; “most boats” covers the middle 80%. Prices checked 21 October 2026.