Speedo Junior Fastskin LZR Ignite Jammer Size Guide

This size guide covers the Speedo Fastskin Junior LZR Ignite Jammer — a World Aquatics approved boys' competition racing jammer designed to feel comfortable for young swimmers during long race meets. The Junior LZR Ignite Jammer shares the same look, feel, and technology as the adult LZR Ignite and offers all the benefits of moderate compression without the restrictive fit — making it the ideal first Fastskin racing suit for junior competitive swimmers aged 7 to 14.

Key features include Speedo's softest Fastskin waistband with silicone gripper for improved comfort and a softer feel against the skin, compressive woven fabric, leg grippers, and bonded dual-layer inner panels that deliver the look and feel of a racing suit from box to blocks, advanced water-repellent coating to help young swimmers glide through the water at speed, and LZR Pulse multi-directional stretch fabric with a water-repellent finish for flexibility throughout the competition day. The suit is also durable and designed to retain its shape for a race-ready fit, time after time. Fully approved by World Aquatics for use in all sanctioned competitions. All measurements are body measurements taken from your child's body, not garment measurements.

Please note: this style is created through a digital printing technique — each suit is individually crafted with a unique print application each time. Your print will differ slightly to the one worn by our model.

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Body Measurement Points

How to Measure

To find the correct Speedo Fastskin Junior LZR Ignite Jammer size, use a soft measuring tape and take measurements directly against your child's skin. Age is shown as a guide only — always use body measurements to find the correct size, as children develop at 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: Ages shown in the sizing table are a guide only. Always measure and use body measurements to select the correct size. Children of the same age can vary significantly in size.

Sizing Table — Boys' Fastskin Junior LZR Ignite Jammer

	Size 24	Size 26	Size 28	Size 30
Age (guide only)	7–8 yrs	9–10 yrs	11–12 yrs	13–14 yrs
Body Measurements
Waist cm	61.0–64.0	65.0–69.0	70.0–74.0	75.0–77.0
Hip cm	70.0–74.5	75.0–79.0	80.0–83.0	84.0–87.0

Ages shown are a guide only. Always use body measurements to select the correct size. All measurements are body measurements, not garment measurements.

Fit Notes — Speedo Fastskin Junior LZR Ignite Jammer

The Speedo Fastskin Junior LZR Ignite Jammer uses moderate compression and is designed to feel comfortable throughout a long race meet. It will feel firmer than a training jammer but is significantly more comfortable than maximum compression Fastskin suits — making it ideal for junior swimmers at their first competition or first tech suit experience.
Always use body measurements to select the correct size — the age guide in the table is indicative only, as children develop at very different rates.
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.
The softest Fastskin waistband with silicone gripper 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 suit should be completely wrinkle-free when correctly fitted. Any bunching or gathering indicates the suit is too large.
The leg grippers should sit snugly at the top of the thigh without digging in, keeping the leg openings in place throughout racing.
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 for the first time. Take care with fingernails and jewellery when pulling up the suit to protect the water-repellent coating.
Do not use petroleum-based products, oils, or creams before putting on the suit — these degrade the water-repellent coating.
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 Junior LZR Ignite Jammer

Yes. The Speedo Fastskin Junior LZR Ignite Jammer is fully approved by World Aquatics (WA) and is legal for use in all sanctioned competitive swimming events. Always check with your event organiser or club for any additional age group or local rules regarding the use of tech suits in junior competition.

The Speedo Fastskin Junior LZR Ignite Jammer is available in sizes 24 to 30, covering an approximate age range of 7 to 14 years. However, age is a guide only — always use body measurements to select the correct size, as children of the same age can vary significantly in size. If your child's measurements fall between two sizes, speak to a member of staff at Allens for guidance.

The Speedo Fastskin Junior LZR Ignite Jammer shares the same look, feel, and technology as the adult LZR Ignite — including the softest Fastskin waistband with silicone gripper, moderate compression, compressive woven fabric with leg grippers, bonded dual-layer inner panels, advanced water-repellent coating, and LZR Pulse multi-directional stretch fabric. The junior version is proportioned and sized specifically for younger swimmers aged 7 to 14, and features digital print designs created through a unique print application process.

Always select by body measurements. The age ranges shown in the sizing table are a guide only — children develop at very different rates and a child's age alone is not a reliable indicator of their 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 Junior LZR Ignite Jammer should feel firm and compressive but comfortable — noticeably tighter than a training jammer but designed to be worn comfortably throughout a full day of competition. The waistband should sit flat against the body with no roll, the leg grippers should hold the leg openings in place without digging in, and the suit should be completely wrinkle-free when correctly fitted.

The Speedo Fastskin Junior LZR Ignite Jammer is suited to all competitive swimming events and all four strokes. It is designed for young swimmers competing at club, county, or regional level who want the benefits of a racing jammer with a comfortable, unrestricted fit throughout the whole competition day.

Yes. The Speedo Fastskin Junior LZR Ignite Jammer is an excellent choice for a young swimmer's first Fastskin racing suit. Its moderate compression, soft waistband with silicone gripper, and comfortable overall fit make it much easier to put on and wear throughout a long competition day compared to maximum compression suits. It is World Aquatics approved and suitable for use in all sanctioned competitions.

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

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 as these will degrade the water-repellent coating. The LZR Ignite is designed to retain its shape over time, but regular care after each use is essential to maximise the lifespan of the suit.

Not exactly. The Junior LZR Ignite Jammer is created using a digital printing technique where each suit is individually crafted with a unique print application. This means your child's suit will have a slightly different print pattern to the one shown on the model or in the product images — but will feature the same colours and overall design. This is a normal characteristic of this product.