Firewire, 2025

Firewire Seaside & Beyond 2025

2032mm long · 6'8"

527mm wide

67mm thick

40.9litres

See similar boards

Open in Studio See it on firewiresurfboards.com

Sizes & Numbers

Listed by the brand, read off a photo, or worked out

In one line

Its width sits further forward. A swallow tail, a medium nose and gently curved rails.

derived · against the 146 other surf boards in the atlas, read off the outlines.

As listed by Firewire

Firewire Seaside & Beyond 2025: every size as listed by Firewire
size	length	width	thickness	weight	price
40.9 L	6'8" · 2032 mm	527 mm	67 mm	–	US$1,255
45.3 L	7'0" · 2134 mm	543 mm	68 mm	–	US$1,255
49.5 L	7'4" · 2235 mm	552 mm	70 mm	–	US$1,255

Prices as the Firewire store showed them on 2026-10-27, in its currency · the cheapest version first, every version on hover

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

Which Seaside & Beyond Size for Your Weight?

The Firewire Seaside & Beyond 2025 size each rider would pick, by weight and level

Your weight

kg≈ 165 lb

Your level

75 kg · getting there · look for 33.8–41.3 L

The Seaside & Beyond 40.9 L

The one size in your range.

Other boards for you

A rule of thumb (0.45 to 0.55 L per kg you weigh), not Firewire’s chart

Every weight and level

Firewire Seaside & Beyond 2025: the size for a rider of 60 to 105 kg, by level
level	60 kg	75 kg	90 kg	105 kg
First sessions0.6 to 0.9 L per kg you weigh	45.3 L	49.5 L	49.5 L · small	too small
Getting there0.45 to 0.55 L per kg you weigh	too big	40.9 L	45.3 L	49.5 L
Confident0.38 to 0.45 L per kg you weigh	too big	too big	40.9 L · big	45.3 L
Expert0.33 to 0.38 L per kg you weigh	too big	too big	too big	40.9 L · big

Rules of thumb, not Firewire’s chart · “small” and “big”: the nearest size, just outside the range · How the sizes are worked out · Find your board

Next to your board?

Lay the Firewire Seaside & Beyond 40.9 L over up to four others, at one scale.

Compare with…

Generations

After it · 2026

The 2026 40.9 L is the same length and width as the 2025 40.9 L. Open the 2026

listed length and width

2025 40.9 L 2026 40.9 L

The Firewire Seaside & Beyond over time

Shape & Rocker

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

Read off the 40.9 L outline · derived

57 %wide point, 1159 mm from the tail

3.84length over width

375mm wide 12″ from the tail

8,522cm² of planform

Read off the 45.3 L outline · derived

56 %wide point, 1201 mm from the tail

3.95length over width

380mm wide 12″ from the tail

9,109cm² of planform

Read off the 49.5 L outline · derived

57 %wide point, 1275 mm from the tail

4.05length over width

380mm wide 12″ from the tail

9,788cm² of planform

Rocker of the 40.9 L · measured

87 mmtail rocker, at the tip

47 mm12″ from the tail

48 mm12″ from the nose

151 mmnose rocker, at the tip

367 mmflat to within 3 mm, from 42 % to 60 % of the length

50 %of the length to the lowest point, from the tail

97 mmat its thickest, 49 % from the tail · on the photo; Firewire lists 67 mm

29 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 45.3 L · scaled from the 40.9 L measured

91 mmtail rocker, at the tip

52 mm12″ from the tail

54 mm12″ from the nose

158 mmnose rocker, at the tip

376 mmflat to within 3 mm, from 43 % to 60 % of the length

50 %of the length to the lowest point, from the tail

99 mmat its thickest, 49 % from the tail

30 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 49.5 L · scaled from the 40.9 L measured

96 mmtail rocker, at the tip

56 mm12″ from the tail

59 mm12″ from the nose

166 mmnose rocker, at the tip

385 mmflat to within 3 mm, from 43 % to 60 % of the length

50 %of the length to the lowest point, from the tail

102 mmat its thickest, 49 % from the tail

32 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 · Measured on Firewire's photo of the 40.9 L. Tail end set by Firewire's photo convention, not checked by a person.