Speedo Male HyperSpark Size Guide

This size guide covers the Speedo Fastskin HyperSpark Jammer — a World Aquatics approved and 12U Race Legal competition racing jammer available in both junior (sizes 18–24, ages 7–14) and adult (sizes 26–32) sizing. The HyperSpark Jammer is designed for fast and comfortable racing for swimmers at every level, from young competitors in their first tech suit to adult club and county swimmers looking for a race-ready jammer with a comfortable, unrestricted fit throughout a full competition day.

Built from 79% recycled nylon and 21% Lycra Xtra Life Elastane, the HyperSpark Jammer features a drawcord tunnel with soft gripper for improved comfort and security at the waist, strategically placed dual lining to provide optimal range of motion and low-level compression for the legs, and flexible knitted fabric with flatlock seams designed for fast and comfortable racing. Fully approved by World Aquatics and 12U Race Legal for junior competition. All measurements are body measurements taken from your own body, not garment measurements.

Shop Mens Speedo Racing Jammers → Shop Kids Speedo Racing Jammers →

Body Measurement Points

How to Measure

To find the correct Speedo Fastskin HyperSpark Jammer size, use a soft measuring tape and take measurements directly against the skin. For junior sizes, age is shown as a guide only — always use body measurements as children develop at very different rates. Use the hip measurement as the primary guide.

A
Hip Measure around the fullest, widest part of the hips and seat, keeping the tape horizontal.
B
Waist Measure 6cm below the narrowest part of the natural waist, keeping the tape level all the way around.

Note: For junior sizes (18–24), ages are a guide only — always use body measurements. Adult sizes (26–32) are sized by body measurements only. The HyperSpark Jammer is designed to feel comfortable during a full competition day and will be firmer than a training jammer but less restrictive than maximum compression Fastskin suits.

Sizing Table — Speedo Fastskin HyperSpark Jammer (Junior & Adult)

	Size 18	Size 20	Size 22	Size 24	Size 26	Size 28	Size 30	Size 32
Age (guide only)	7–8 yrs	9–10 yrs	11–12 yrs	13–14 yrs	Adult	Adult	Adult	Adult
Body Measurements
Waist cm	61.0–65.0	66.0–70.0	70.0–72.5	73.5–76.0	77.5–80.0	81.5–85.0	86.5–90.0	91.5–95.5
Hip cm	71.0–75.0	76.0–80.0	80.0–82.5	84.0–86.5	87.5–90.0	91.5–95.5	96.5–100.5	101.5–105.5

Junior sizes (18–24): ages shown are a guide only — always use body measurements. Adult sizes (26–32): sized by body measurements only. All measurements are body measurements, not garment measurements.

Fit Notes — Speedo Fastskin HyperSpark Jammer

The Speedo Fastskin HyperSpark Jammer is designed for fast and comfortable racing with low-level compression — it will feel firmer than a training jammer but is designed to be comfortable throughout a full competition day, making it an excellent choice for junior swimmers and adult club competitors alike.
The HyperSpark Jammer is 12U Race Legal, meaning it is approved for use in under-12 competitions where some higher-compression Fastskin suits may not be permitted. Always check with your event organiser for specific rules.
If measurements fall across different size brackets, use the hip measurement as the primary guide, as the jammer needs to seat correctly over the hips before the waistband can sit flat.
For junior sizes (18–24), always use body measurements rather than age — children develop at very different rates and age alone is not a reliable indicator of the correct size.
The drawcord tunnel with soft gripper waistband should sit flat and secure against the body with no roll or gap at the back, providing all-day comfort throughout the competition day.
The flatlock seams should lie flat against the skin with no rubbing or pressure points. The flexible knitted fabric is designed to move with the body during racing.
The suit should be completely wrinkle-free when correctly fitted. Any bunching or gathering indicates the suit is too large.
The leg hems should end above the knee in line with WA regulations and feel snug but not restrict movement or blood flow.
Allow 10–15 minutes to try on correctly. Take care with fingernails and jewellery when pulling up the suit to protect the knitted fabric.
Do not use petroleum-based products, oils, or creams before putting on the suit — these degrade the fabric's water-repellent properties.
Rinse in cold fresh water immediately after each use. Do not tumble dry, iron, or dry-clean.
Unsure? Contact our team or call +44 1827 330600.

Frequently Asked Questions — Speedo Fastskin HyperSpark Jammer

Yes. The Speedo Fastskin HyperSpark Jammer is fully approved by World Aquatics (WA) and is legal for use in all sanctioned competitive swimming events. It is also 12U Race Legal, meaning it is approved for use in competitions for swimmers under 12 years of age where certain higher-compression Fastskin suits may not be permitted. Always check with your event organiser or club for any local age group rules.

12U Race Legal means the suit has been certified as suitable for use in competitions for swimmers aged 12 and under, where stricter rules apply to the type of tech suit that can be worn. Some higher-compression Fastskin suits may not be permitted in under-12 competitions at certain events. The HyperSpark's low-level compression and flexible knitted construction make it compliant for these events. Always verify with your event organiser before competition.

Yes. The Speedo Fastskin HyperSpark Jammer is available in both junior sizing (sizes 18–24, approximately ages 7–14) and adult sizing (sizes 26–32). Both ranges use the same technology and construction. Junior ages are a guide only — always use body measurements to select the correct size regardless of whether you are buying for a junior or adult swimmer.

Always select by body measurements. For junior sizes, the age ranges shown are a guide only — children develop at very different rates and age alone is not a reliable indicator of the correct size. Measure the waist and hip and compare to the sizing table above, using the hip measurement as the primary guide. Speak to a member of staff at Allens if you are unsure.

The HyperSpark Jammer should feel firm but comfortable — noticeably snugger than a training jammer but without the high compression of suits like the LZR Pure Intent 2. The drawcord tunnel with soft gripper waistband should sit flat with no roll, the flatlock seams should lie flat against the skin, and the suit should be completely wrinkle-free when correctly fitted. It is designed to be worn comfortably throughout a full day of competition.

The HyperSpark sits at the entry level of the Speedo Fastskin racing range. It uses a flexible knitted fabric with flatlock seams and low-level compression dual lining, making it the most comfortable and least restrictive of the Fastskin jammers. The LZR Ignite offers moderate compression with a softer Fastskin construction and silicone gripper waistband, while the LZR Pure Valor 2 and LZR Pure Intent 2 offer progressively higher compression with advanced water-repellent coatings for higher-level competition. The HyperSpark is also the only Fastskin jammer that is 12U Race Legal.

The Speedo Fastskin HyperSpark Jammer is suited to all competitive swimming events and all four strokes. It is ideal for junior swimmers competing at club and county level, adult swimmers entering tech suit competition for the first time, or any swimmer who wants a race-legal jammer with a comfortable fit that can be worn throughout a long competition day.

The HyperSpark Jammer is a competition racing suit and is not designed for regular training use. Using it for training will degrade the fabric and shorten the lifespan of the suit. For training, Speedo offer a wide range of junior and adult training jammers. Reserve the HyperSpark for races and competition warm-ups to maintain its performance and durability.

The main body of the Speedo Fastskin HyperSpark Jammer is made from 79% recycled nylon and 21% Lycra Xtra Life Elastane. The recycled nylon construction makes it a more sustainable choice without compromising on race performance. The flexible knitted fabric with flatlock seams is specifically designed for fast and comfortable racing across a full competition day.

Rinse the suit thoroughly in cold fresh water immediately after every use to remove chlorine and salt. Do not machine wash, tumble dry, iron, or dry-clean. Store the suit flat and dry, away from direct sunlight. Avoid contact with sun cream or petroleum-based products. Regular care after each use is essential to maximise the lifespan of the suit.