General
Monohull
Technical Specifications
Sail specifications and key dimensions for this model.
13.70 m
LOA
Mainsails from $1,992.02, custom-made for your boat
Monohull
13.70 m
Length Overall
17.77 m
4.98 m
15.79 m
5.92 m
17.07 m
18.45 m
Mainsail pricing for the GRAHAM RADFORD 13.7 is based on the rig dimensions for this model and your selected build and finish options.
After you complete your purchase this is what will happen:
Pricing for GRAHAM RADFORD 13.7 sails is calculated from the stored dimensions for this model, the selected sail type, the chosen build, and any relevant optional extras. Final quotations should still be checked against the actual rig, hardware, and fit of the boat before production.
Cross-cut construction is typically the more straightforward cruising option, with strong day-to-day durability and simpler panel layout. Radial-cut construction uses load-aligned paneling where available, which generally improves shape retention and performance.
Yes. Optional extras are tied to the selected sail family and sail type, so only relevant options are shown in the configurator. Hardware, reefs, UV treatments, bags, ropes, and reinforcement packages appear only where they apply.
It upgrades the parts of the sail that carry the most load: the corner patches, the seam stitching, the reef points, and the head, tack and clew fittings. The standard Coastal Cruising build is specified for club sailing and recreational cruising. The Offshore build is specified for blue water passages and longer distance sailing. If you are planning ocean miles, or you simply want more margin built into the sail from the start, this is the option to add.
Published specifications are the starting point, not the final production sign-off. If your spar, furler, hardware, or previous sail measurements differ, use the quotation flow so the specification can be reviewed before an order is confirmed.
Why buy from us
We believe a well-built sail should combine sound design, quality materials and skilled craftsmanship to deliver performance you can trust over time.



What that means in practice
Boat-specific specification
Every sail is made to suit your boat, with build, cloth, shape and finish options selected around your priorities.
Designer-led loft
Established in 2017, SEA Sailmakers is led by founders and sail designers with decades of sailmaking experience.
Materials and hardware
We use proven sailcloth and hardware from trusted suppliers, matched to the sail type, intended use and performance brief.
After-purchase support
Our sails are backed by a clear warranty for added peace of mind after purchase.
Verified Google Reviews
Sim Peter
1 month ago
5 stars Sales Services Robert and His team ,Sine and ladies 谢谢您
Axel Jepsen
6 days ago
Salgsforløbet har været professionelt med hurtige svar og relevante spørgsmål i afklaringsfasen.
Andrew Brickman
7 days ago
Communication between me the staff and Robert was always prompt and thorough.
BM Registers
10 days ago
Excellent and fast sail repair service. Very easy to contact and work with, including clear and precise communication. Fair price also! Highly recommended.
Yesim Sayin Taylor
14 days ago
He was reliable, patient, and meticulous, guiding me through every measurement and then helping me check—and recheck—everything before production began.
Sim Peter
1 month ago
5 stars Sales Services Robert and His team ,Sine and ladies 谢谢您
Axel Jepsen
6 days ago
Salgsforløbet har været professionelt med hurtige svar og relevante spørgsmål i afklaringsfasen.
Andrew Brickman
7 days ago
Communication between me the staff and Robert was always prompt and thorough.
Secure checkout
Card payments taken securely through Stripe.
Worldwide shipping
Every finished sail ships tracked, worldwide.
Expert sail support
Our loft helps you get the spec right first time.
Not sure which sail you need? Talk to our sail loft.