3×6 vs 3×9 vs 3×12 Marquee: Which Size Marquee to Buy
If you're trying to work out which size marquee to buy, the choice almost always comes down to the three most popular footprints we sell: the 3×6m, the 3×9m and the 3×12m. They share the same handy 3m depth, so they all tuck neatly down a driveway or along a fence line — the only thing that changes is the length, and therefore how many people you can comfortably fit. This guide breaks down who each one is for, so you buy once and get it right.
The quick answer
Think about your biggest gathering, not your average one — you want the marquee that still works when everyone turns up. Here's how the three compare side by side:
| Marquee | Footprint | Area | Standing | Seated (rows) | Seated dining |
|---|---|---|---|---|---|
| 3×6m Marquee | 3 × 6m | 18m² | ~30 | ~20 | ~12 |
| 3×9m Marquee | 3 × 9m | 27m² | ~45 | ~30 | ~18 |
| 3×12m Event Shelter | 3 × 12m | 36m² | ~60 | ~40 | ~24 |
Those numbers are based on the room each guest actually needs: about 0.6m² standing, 0.9m² seated in rows and 1.5m² for a sit-down meal. Add roughly 25% on top if you also want a dance floor, a bar or a buffet table under cover.
3×6m — the backyard all-rounder
The 3×6m is the size most people actually need and don't realise it. At 18m² it covers a backyard birthday, a long table of 10–12 for a sit-down lunch, or a crowd of up to 30 mingling with drinks. It's light enough for two people to set up, and small enough to store in the shed without it taking over. If your get-togethers are family-sized and you want one marquee that earns its keep year-round, start here.
3×9m — the step up for proper parties
The 3×9m is the one to pick when "a few people over" turns into "a proper party." That extra 3m of length takes you from ~12 diners to ~18, or up to 45 standing — enough for an engagement do, a milestone birthday, or a market stall with room to move. It's the natural choice if the 3×6 feels like it'll be a squeeze on your busiest day, without jumping to the largest size.
3×12m — maximum cover, one marquee
The 3×12m Event Shelter is for when you genuinely need to get a crowd under cover. At 36m² it seats around 24 for dinner, 40 in rows, or handles 60 standing — community events, big family Christmases, club functions, or a market run where you want the whole setup in one continuous shelter. In anthracite it also looks the part for more event-style occasions, not just the backyard.
How to choose between them
- Count your biggest day, then size up. If you're regularly on the line between two sizes, the larger one is the one you won't regret.
- Dining needs far more room than standing. A 3×6 fits ~30 standing but only ~12 at tables — if it's always sit-down meals, jump a size.
- Weather changes the maths. If rain could push everyone under cover at once, plan for everyone seated, not just the standing number.
- Got more than ~60 guests? Look at the 10×5m wedding marquee (50m²) instead, or run two marquees side by side.
Smaller crowd? The 3×3m pop-up gazebo covers up to ~15 standing — it's currently out of stock, so email us to be notified when it's back. Camping or after something packable? The inflatable camping tent is worth a look.
Still on the fence?
Plug your guest count into our marquee size calculator for an instant recommendation, or browse the full range to compare them all in one place. Not sure which way to go? Email support@brisbanemarqueesales.com.au and we'll help you pick the right size for your space and crowd.
Whichever you choose, you order online and it's dispatched in ~2 days with free delivery Australia-wide — and because it's yours, it's on hand for every party after this one too.
Common questions
What is the difference between a 3×6, 3×9 and 3×12 marquee?
All three are 3m deep — only the length changes. The 3×6m gives 18m² (~30 standing / ~12 dining), the 3×9m gives 27m² (~45 standing / ~18 dining), and the 3×12m gives 36m² (~60 standing / ~24 dining).
Which size marquee should I buy for a backyard party?
For most backyard parties the 3×6m marquee (18m²) is the sweet spot — it suits a long table for 10–12 or up to 30 guests standing. Step up to the 3×9m if your busiest day pushes past that.
How many people fit under a 3×12 marquee?
A 3×12m event shelter is 36m² and holds roughly 60 people standing, 40 seated in rows, or 24 at tables for a sit-down meal.
How quickly will my marquee arrive?
You order online and your marquee is dispatched in around 2 days with free delivery Australia-wide. Email support@brisbanemarqueesales.com.au if you need help choosing a size.