FLITELab* Boards Size Guide

Slack Tide Foil Club

FLITELab* Board Size Guide

Find the right AMP board for your ability level, weight, and riding style. More volume means easier paddle-ups and a more forgiving ride — always the better choice when in doubt.

AMP_M_Board — Mid-Length

Downwinding · Winging · Surf Foiling

The M series is the go-to starting point for most riders on the AMP system. A wider outline and higher volume make paddle-ups easier, and the extra stability means you spend more time flying and less time swimming.

Recommended starting point

AMP_M_5'8"

5'8" × 19" × 4.2" × 65L

Beginner Intermediate

Length5'8" (172cm)

Width19"

Thickness4.2"

Volume65L

Rider weightAny / up to 90kg+

Volume65L

Best for

Beginners Winging Downwinding Heavier riders efoil progression

AMP_M_5'0"

5'0" × 18" × 3.5" × 45L

Intermediate Advanced

Length5'0" (152cm)

Width18"

Thickness3.5"

Volume45L

Rider weightUp to ~75kg

Volume45L

Best for

Performance winging Surf foiling Downwinding Lighter riders

Ability	Rider weight	Recommended size	Notes
Beginner	Any weight	5'8" – 65L	Maximum volume means easier paddle-ups and more forgiveness on takeoff
Intermediate	Under 70kg	5'0" – 45L	Responsive and agile; great for winging and prone in varied conditions
Intermediate	70kg+	5'8" – 65L	Extra volume prevents sinking on takeoff; AMPJet bridges the gap quickly
Advanced	Under 75kg	5'0" – 45L	Lower volume = snappier turns and faster response; ideal for surf foiling
Advanced	75kg+	5'8" – 65L	Volume advantage outweighs board size for heavier advanced riders

AMPJet tip: With the AMPJet assist, most riders can comfortably size down 5–10L compared to their usual board. If you're between sizes, always go bigger — you can progress down once your foiling is dialled in.

AMP_S_Board — Surf Shape

Surf Foiling · Advanced Winging · Downwinding

The S series is a high-performance prone surf shape. Shorter, narrower, and lower volume than the M — designed for riders who are comfortable on foil and want more agility and response in the surf.

Recommended starting point

AMP_S_4'8"

4'8" × 20" × 40L

Beginner Intermediate

Length4'8" (142cm)

Width20"

Volume40L

Rider weightUp to ~80kg

Volume40L

Best for

Beginner S-series riders Intermediate surf foil Winging

AMP_S_4'6"

4'6" × 18.5" × 32L

Intermediate Advanced

Length4'6" (137cm)

Width18.5"

Volume32L

Rider weightUp to ~70kg

Volume32L

Best for

Surf foiling Advanced winging Lighter riders

AMP_S_4'2"

4'2" × 17.5" × 27L

Advanced

Length4'2" (127cm)

Width17.5"

Volume27L

Rider weightUp to ~65kg

Volume27L

Best for

High performance surf Expert prone foiling Lighter/skilled riders

Ability	Rider weight	Recommended size	Notes
Beginner	Any weight	4'8" – 40L	Most volume in the S range; wider tail aids stability on takeoff
Intermediate	Under 65kg	4'6" – 32L	Balanced between agility and forgiveness; a strong all-rounder
Intermediate	65kg+	4'8" – 40L	Extra volume keeps heavier intermediate riders comfortable on takeoff
Advanced	Under 65kg	4'2" – 27L	Maximum agility and response; a high-performance machine in the surf
Advanced	65–75kg	4'6" – 32L	Performance and volume balance for heavier advanced riders
Advanced	75kg+	4'8" – 40L	Recommend the M series if you want more assist-friendly volume

S vs M series: If you're new to foiling or transitioning from an efoil, the AMP_M_Board is the better starting point. The S series is purpose-built for the surf — it rewards riders who already have their foil legs.