7-a-side vs 8-a-side vs 11-a-side football: differences, sizes and rules

The three formats share the same goal — playing football — but change the space, the number of players and some rules. This is the reference comparison:

7-a-side is played with seven players (six outfield plus the goalkeeper) on a rectangle of 50 to 65 m long by 30 to 45 wide, with 6 × 2 m goals and a size-3 or 4 ball depending on the category. It is the entry format into federated football across most of Spain.

The most talked-about difference is offside: the RFEF's 7-a-side rules and most federations do not apply it, though some regional federations use a reduced version. Fewer players and little or no offside mean more touches and more participation per child.

The small pitch forces quick decisions in tight spaces. It is the technical base on which everything else is built.

8-a-side is an intermediate format specific to Spanish grassroots football: eight players (seven outfield plus the goalkeeper) on a pitch similar in size to 7-a-side (50-65 × 30-45 m) with 6 × 2 m goals. Many federations use it at benjamín and alevín instead of 7-a-side.

The key difference from 7-a-side is not just one more player: 8-a-side does apply offside, with a 12-metre zone from the opponent's goal line. That detail brings the game closer to 11-a-side and prepares the player to understand depth and the last line.

That is why many regions choose 8-a-side as the previous step: it keeps the participation of the small-sided format but introduces the offside concept before the jump to the full pitch.

11-a-side is the format of adult football and of categories from infantil onwards: eleven players per team (ten outfield plus the goalkeeper), a pitch of 90 to 120 m long by 45 to 90 wide (105×68 standard) and regulation 7.32 × 2.44 m goals.

Here offside is the standard one from the Laws of the Game (IFAB): applied across the whole opponent's half with the second-last-defender rule. The ball moves to size 5 and the space multiplies.

The jump to 11-a-side is the big change in grassroots football: a large pitch, decisive offside and a real need to occupy width and depth. Preparing that jump is the goal of the last small-sided categories.

Small-sided formats are not "lesser" football: they are a teaching tool. With fewer players, each child touches the ball more, decides more often and takes part more. A small pitch multiplies technical actions per minute versus an eleven pitch, where a young child would spend long spells without touching the ball.

The 7 → 8 → 11 progression introduces complexity in steps: first technique and decision-making in tight space, then offside, and finally the full pitch with width and depth. How to work each stage is covered in grassroots football exercises by age.

The pivot category towards the eleven is alevín; its session template, with the detail of the jump, is in how to coach alevín (U-12).

The format depends on the category and the regional federation. Broadly: prebenjamín and benjamín in 7 or 8-a-side, alevín in 8-a-side (7-a-side in Madrid) and infantil onwards in 11-a-side. The exact match of age, category and format is in grassroots football categories by age.

Before planning, confirm the format in your federation's competition rules: they change from one region to another. And if you are looking for the qualification to coach each category, start with the course catalogue or ask the assistant.