The honest answer most rental companies won't tell you: probably smaller than you think. Here's how to size it properly — and save money doing it.
The capacity rule of thumb
As a working guide, allow about one child per 1.5m² of bounce area. A castle with a 3m x 3.3m bounce floor comfortably takes around 6 kids at once; a 9m x 5m unit takes around 30. Bigger kids need more room, and adults (yes, adults are welcome) count for more than one child each. Treat these as guidance for a good, safe bounce — not a loading limit to max out.
The same rule, drawn to scale
One dot is one child, at about 1.5m² each.
The mistake everyone makes: sizing for the guest list
A party with 20 kids does not need a castle that holds 20 kids at once. Children rotate naturally — some jump while others eat, play, or catch their breath. In practice a castle that takes 6–8 at a time keeps a 20-child party happily busy all afternoon. Sizing for the whole guest list means paying for capacity that stands empty.
Size by your space, not just your party
Measure your lawn or venue before you book. Every product page on our catalogue lists exact dimensions — compare them to your space and leave extra room around the unit for anchoring and the blower. If you're unsure whether a castle fits your yard, WhatsApp us a photo and the measurements and we'll tell you straight.
Quick picks
- •Toddlers' party at home: a small castle (Standard Castle (Small), R610)
- •Mixed-age birthday, 15–25 guests: a mid-size unit
- •School fete / big event: a large castle or two smaller ones (two units often beats one giant — shorter queues)
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