MEASURE TWICE · ORDER ONCE · FREE EXCHANGES ON SIZE
The Fit Guide
HOW TO MEASURE
FOR THE PERFECT FIT
Five minutes with a tape measure saves you a return. Pick your category below and follow the steps — works for any boat, outboard or caravan.
THE 3 GOLDEN RULES
- Measure in metres or feet — pick one and stick with it. Don't mix.
- If you're between sizes, ALWAYS go UP. A slightly loose cover beats one that won't close.
- Measure twice, write it down. Then send us a photo of your setup if you're unsure — we'll confirm before you order.
Step 1
BOAT COVERS
Measure your boat from the tip of the bow to the centre of the transom (back). Always measure the hull length only — not the trailer, swim platform, anchor bracket or outboard.
You'll need
- Tape measure (10m+)
- A friend to hold the tape
- Pen & paper
Measure these points
- 1Centre-line length (A)Run the tape along the top centre of the boat from the tip of the bow to the centre of the transom. Keep it taut and level.
- 2Maximum beam (B)Measure the widest point of the boat, usually across the middle of the cockpit, gunwale to gunwale.
- 3Windshield height (C)From the deck up to the highest point of the windshield, bow rail or T-top.
- 4Hull typeNote whether you have a runabout, centre console, bowrider, cuddy cabin, walkaround or tinnie — fit varies by style.
Pro Tips
- ▸Do NOT include outboard motor or bow pulpit length — those use separate covers.
- ▸If your measurement falls between sizes, ALWAYS go up one size.
- ▸Allow extra length for a bow rail or pulpit (add ~30cm).

Step 2
OUTBOARD MOTOR COVERS
Outboard covers come in two styles: Full cover (covers the entire leg + cowl) and Half / Vented cover (cowl only, for use while running or trailering).
You'll need
- Tape measure (3m)
- Motor make, model & HP
Measure these points
- 1Cowl length (A)From the front of the cowl to the rear, along the top.
- 2Cowl width (B)Widest point of the cowl, side to side.
- 3Cowl height (C)From the bottom of the cowl (where it meets the midsection) to the top.
- 4Leg length (D) — full covers onlyDistance from the bottom of the cowl down to the cavitation plate above the prop. Common sizes: 15" (Short), 20" (Long), 25" (X-Long), 30" (XX-Long).
- 5Number of cylinders & HPe.g. Yamaha F150D 4CYL 2.8L 2023>. This is the fastest way to find your exact fit.
Pro Tips
- ▸Engine make + model + year is more reliable than measurements — use it first.
- ▸Half covers are designed to stay on while the engine is running.
- ▸Don't try to fit a 4-stroke cover to a 2-stroke (or vice versa) — cowls are completely different shapes.

Step 3
CARAVAN COVERS
Caravan covers are sized by body length only — that's the length of the van itself, not including the A-frame/drawbar or rear bumper bar.
You'll need
- Tape measure (10m+)
- Step ladder (for height check)
- A helper
Measure these points
- 1Body length (A)From the FRONT of the caravan body (where it meets the A-frame) to the very BACK of the body. Do NOT include the drawbar or spare wheel.
- 2Overall width (B)Widest point of the van, side to side, including any flares but excluding awnings and pulled-in steps.
- 3Overall height (C)From ground to the highest point — usually the air conditioner, antenna or roof hatch.
- 4Features to notePop-top, rooftop A/C, solar panels, awning, sloped front — these all affect cover style and seam placement.
Pro Tips
- ▸Roll back awnings, fold steps in and lower the antenna before measuring.
- ▸Cover lengths are listed as ranges (e.g. 18'–20' / 5.5–6.1m). If you're between ranges, go UP.
- ▸Pop-top vans need a pop-top-specific cover with extra room at the top seam.

STILL NOT SURE?
Send us your measurements and a photo — we'll confirm the right cover before you order. No charge, no pressure.