Guide to Rugby League Ball Sizes | Size 3, 4, and 5 Explained

Choosing the correct ball size is a common challenge for every parent and new player. But getting it right is crucial, as the ball's size directly impacts a player's ability to catch, pass, and kick during those essential development years. This guide explains rugby league ball sizes, so you can confidently choose the perfect ball for any age or level. 

Key Takeaways 

• Size is Strictly Age-Based: Ball size is determined by the player's age. The three sizes are Size 3 (Mini) for under 9s, Size 4 (Mod) for 10–12s, and Size 5 (Senior) for 15+. 
• Never Use an Oversized Ball: Using a ball that is too big hinders a player's ability to develop proper grip and passing technique during crucial junior years. 
• Size 5 is the Full Standard: A full size rugby ball refers exclusively to the Size 5, which is the official standard used across all senior and professional competitions. 

What Are Rugby League Ball Sizes? 

In Rugby League, the balls are categorised into three main sizes: Size 3, Size 4, and Size 5. These sizes are essential because they ensure the ball perfectly matches the player's hand size, strength, and overall ability, which is vital for proper passing and catching technique during development. 

The sizing depends entirely on the player's age and competition rules. To make it easier for parents and clubs, these sizes are often referred to by the competition names: 

• Size 5 is the Senior ball. 
• Size 4 is the Mod ball. 
• Size 3 is the Mini ball. 

How Big is a Size 3 Rugby Ball? 

The Size 3 rugby ball is also known as the Mini size 3 and is specifically designed for the youngest players entering the sport. 

This ball is essential for building confidence and developing fundamental skills without being too heavy or large for small hands. 

• Age Group: Under 7s to Under 9s (U7–U9). 
• Dimensions: It measures approximately 23 cm to 24 cm from tip to tip (straight line). 
• Key Benefit: It has a smaller circumference and lighter weight than the larger sizes, making it easier for juniors to master the grip, pass correctly, and execute a comfortable kick. 

How Big is a Size 4 Rugby Ball? 

The Size 4 rugby ball is commonly known as the Mod size 4 and serves as the vital intermediate step for developing players. This ball is designed to challenge juniors to refine their skills before moving to the adult size. 

• Age Group: Under 10s to Under 12s (U10–U12). 
• Dimensions: It measures approximately 25 cm to 26 cm from tip to tip (straight line). 
• Key Benefit: It is slightly larger and heavier than the Size 3. Using a Mod size 4 helps players transition by developing the necessary grip strength, passing distance, and ball control needed for senior rugby. 

How Big is a Size 5 Rugby Ball? 

The Size 5 rugby ball, also known as the Senior size 5, is the official and largest ball used in the game. 

• Age Group: Ages 15 years and above (including all adult players). 
• Usage: This ball is used in all senior, open-age, and professional rugby league competitions. 
• Key Benefit: This size adheres to the official standard for professional play, requiring maximum grip strength and passing power. It is significantly larger and heavier than the Mini or Mod sizes. 

What is a Full-Size Rugby Ball? 

The term full size rugby ball refers exclusively to the Size 5 ball. This is the official standard for the sport and the largest size available. It is used universally across all adult, open-age, and professional rugby league matches, including the National Rugby League and all senior competitions. There is no larger ball used in the game. 

Rugby League Ball Size Chart by Age 

To quickly determine the correct size for a player, reference this chart. Matching the ball to the player's age is essential for proper skill development. 

Tips for Choosing the Right Rugby League Ball 

Match the Ball to Player Age and Competition 

• Prioritise the Size Chart: Never choose an oversized ball assuming a player will "grow into it." This immediately hinders proper grip and passing technique. 
• Stick to Official Sizes: The Mini (Size 3), Mod (Size 4), or Senior (Size 5) guidelines align with competition standards. 

Choose Quality Materials for Durability 

• Training Balls: Look for durable rubber or robust synthetic materials to withstand frequent use on varied surfaces. Durability is the primary focus. 
• Match Balls: Choose higher-grade synthetic leather (PU) for superior grip, feel, and performance reserved for competition day. 

Don't Overlook Practice vs. Match Use 

Serious players benefit from having both a rugged, lower-cost training ball and a high-performance match ball. 

Always ensure all balls are inflated to the correct pressure for optimal passing and kicking. 

Summit Sport Rugby League Balls 

As a trusted provider of rugby league equipment, Summit Sport ensures you have access to the full range of officially sized balls needed for proper development and competition. 

• All Official Sizes Stocked: We carry a complete rugby ball range, from the Mini Size 3 for beginners, to the Mod Size 4 for juniors, and the Senior Size 5 for all adult and professional play. 
• Built for Quality & Durability: Our rugby balls feature high-grade materials and superior bladder retention, making them ideal for the demands of rigorous club training, school use, and competitive match play. 
• The Club & School Choice: We partner with schools and clubs across Australia, offering reliable, durable balls that meet the standards required for every level of the game. 

Ready to Shop? Find Your Size at Summit Sport 

Choosing the right rugby league ball size, whether it's the Mini Size 3, Mod Size 4, or Senior Size 5, is the most crucial decision you can make for a player's development. Matching the ball to the player's age ensures they build the proper grip, passing technique, and confidence needed to succeed. 

Don't let guesswork hold back performance. Explore the full Summit Sport range and buy rugby league balls today.