Duotone, 2026

iSUP Alfa WS Air 2026

3353mm long · 11'0"

851mm wide

152mm thick

350litres

Open in Studio See it on duotonesports.com

Sizes & Numbers

Listed by the brand, read off a photo, or worked out: where every number comes from

In one line

A fuller nose than most. A rounded pin tail, a full nose and parallel rails.

derived · against the 157 other sup boards in the atlas, read off the outlines.

As listed by Duotone

Duotone iSUP Alfa WS Air 2026: every size as listed by Duotone
size	length	width	thickness	weight
180 L	9'0'' · 2743 mm	737 mm	121 mm	7.5 kg
350 L	11'0'' · 3353 mm	851 mm	152 mm	11.2 kg

Every size side by side, tails on one line, one scale

Next to your board?

Lay the Duotone iSUP Alfa WS Air 350 L over up to four others, at one scale.

Compare with…

Shape & Rocker

From above, then from the side, true scale · the chosen size solid, the others dashed

Read off the 180 L outline · derived

55 %wide point, 1496 mm from the tail

3.72length over width

494mm wide 12″ from the tail

16,733cm² of planform

Read off the 350 L outline · derived

55 %wide point, 1829 mm from the tail

3.94length over width

529mm wide 12″ from the tail

23,647cm² of planform

Rocker of the 180 L · scaled from the 350 L, borrowed (≈), estimated

≈ 31 mmtail rocker, at the tip

≈ 6 mm12″ from the tail

≈ 20 mm12″ from the nose

≈ 85 mmnose rocker, at the tip

≈ 1387 mmflat to within 3 mm, from 23 % to 74 % of the length

48 %of the length to the lowest point, from the tail

≈ 121 mmat its thickest, 42 % from the tail

≈ 43 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 350 L · borrowed (≈), estimated

≈ 42 mmtail rocker, at the tip

≈ 10 mm12″ from the tail

≈ 31 mm12″ from the nose

≈ 107 mmnose rocker, at the tip

≈ 1587 mmflat to within 3 mm, from 26 % to 73 % of the length

48 %of the length to the lowest point, from the tail

≈ 152 mmat its thickest, 42 % from the tail

≈ 53 mmlonger along the bottom curve than flat

Lay this rocker over other boards

True proportions · dots at 10 mm and 12″ in from each tip · bracket: flat to within 3 mm · drawn hollow: no usable side photo of this board · shaded: the middle 80 % of its group · No usable side photo of this board: the median of 49 inflatable SUP boards from 39 product lines. Tail ends set by rule, Claude or a brand convention on their photos, none checked by a person. · estimated