Australia Post girth limit — 140 cm.

Australia Post size limits

Australia Post enforces thresholds that affect what you pay and whether your package ships. The calculator above flags each one automatically.

• Up to 40 inches: Standard rates.
• 40 – 55 inches: Australia Post charges by dimensional weight for parcels exceeding standard size thresholds. Cubed pricing applies for low-density items.
• Over 55 inches: Over 140 cm length + girth, or over 105 cm length, parcels require StarTrack or freight services.

Maximum single side: 41 in. Maximum weight: 49 lb. Always verify against the current Australia Post rate guide before shipping high-value items.

How Australia Post measures girth

Australia Post uses the standard girth formula:

girth = 2 × (width + height)
length + girth = length + 2 × (width + height)

Worked example. A 50 × 20 × 20 inch box has girth (20 + 20) × 2 = 80 inches, and length + girth = 130 inches.

Australia Post measures girth around the thickest part — 2 × (W + H) for boxes, circumference for cylinders.

Australia Post vs other carriers

If your package exceeds Australia Post limits, here's how it compares:

Frequently asked