Maru Short Blade Fins Size Guide

The Maru Short Blade Fins are a lightweight, high-grade silicone training fin designed for regular pool use. The short blade design promotes ankle flexibility and supports the development of a correct kicking action, making them ideal for swimmers looking to build leg strength and improve technique. Sizing is based on UK shoe size.

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Sizing Table — Maru Short Blade Fins
Size UK Shoe Size EU Shoe Size
XXS 12–1 30–33
XS 1–2.5 33–35
S 3–5 36–38
M 5–7 38–41
L 7–9 41–43
XL 9.5–11 44–46

Sizing is based on UK shoe size. If you fall between sizes, we recommend sizing up for a more comfortable fit. Contact Allens if you need guidance.

Fit Notes — Maru Short Blade Fins
  • Sizing is based on UK shoe size — use the table above to find your size. EU equivalents are shown as a secondary reference.
  • The fins are made from high-grade silicone with a soft, flexible construction. They should fit snugly over the foot without pinching or causing discomfort — if the fin feels tight across the top of the foot, try the next size up.
  • The short blade design keeps the fin close to the foot, which encourages a faster, more natural kick rhythm compared to longer training fins.
  • Suitable for regular training use — rinse in fresh water after every session and allow to dry naturally away from direct sunlight.
  • Unsure? Contact our team or call +44 1827 330600.
Frequently Asked Questions — Maru Short Blade Fins

Use your UK shoe size and match it to the size table above. EU equivalents are also shown. If you fall between two sizes, size up for a more comfortable fit — the silicone material is flexible but should not feel tight across the top of the foot.

Short blade fins sit closer to the foot and promote a faster, higher cadence kick that more closely mirrors natural swimming technique. Longer fins generate more propulsion but can encourage a slower, wider kick that does not translate as effectively to open swimming. Short blade fins are generally preferred for technique-focused training and swimmers who want to develop a quicker, more efficient kick action.

Yes. The size range starts at XXS (UK 12–1), which covers younger swimmers with smaller feet. Always size by UK shoe size rather than age, as foot size varies considerably between children of the same age.

The Maru Short Blade Fins are designed primarily for pool training use. They can be used in open water but the short blade length provides less propulsion in open conditions. Rinse thoroughly in fresh water after any open water or sea use to remove salt and debris.

Rinse in cold fresh water after every session to remove chlorine, salt, and debris. Allow to dry naturally away from direct sunlight — do not leave in direct heat or a hot bag, as prolonged heat exposure can degrade the silicone over time. Store flat or hanging to keep the fins in shape.

The fins are made from 100% high-grade silicone, which gives them a soft, comfortable fit and good durability for regular training use. Silicone fins are generally more comfortable than rubber alternatives and hold their shape well over time.