About Little Puggles: a family business in Bendigo designing premium baby nappies and wipes. Australian-owned, Dermatest® Sensitive Skin certified. Read our story.
How to choose nappy size by weight (Australia)
How to size by weight
Weigh your bub in just a singlet, or naked, on the bathroom scales. Most babies will be in the middle of a weight range, which means they'll fit comfortably in that size for the longest period. If your bub is at the top of a size range, you're probably about 2 to 4 weeks from a transition. If they're at the bottom of a size range, that size will likely fit for 6 to 10 weeks.
What size nappy is right
for my baby's age?
Age is a useful starting point but weight is more reliable. Babies of the same age can vary widely in weight, and a Size 3 fits a chunky six-month-old and a smaller eight-month-old equally well. Use the age column as a rough guide and the weight column as the answer.
Age
Most likely tape size
Most likely pants size
0 to 2 months
Size 1
Pants start at Size 3
2 to 3 months
Size 2
Pants start at Size 3
3 to 7 months
Size 3
Size 3
7 to 12 months
Size 4
Size 4
12 to 18 months
Size 5
Size 5
18 to 24 months
Tape ends at Size 5
Size 6
If your bub's weight and age are pointing to different sizes, go with the weight.
Weight ranges, tape nappies (Sizes 1 to 5)
Size
Weight range
Approximate age
Pieces per pack
1
3 to 5 kg
0 to 2 months
36
2
4 to 8 kg
2 to 3 months
32
3
6 to 11 kg
3 to 7 months
28
4
9 to 14 kg
7 to 12 months
24
5
12 to 17 kg
12 to 18 months
20
Sizes overlap deliberately. A 7 kg bub could comfortably wear Size 2 or Size 3, depending on body shape, leg width, and how active they are. Trust the fit, not just the weight number.
Weight ranges, nappy pants (Sizes 3 to 6)
Size
Weight range
Approximate age
Pieces per pack
3
6 to 11 kg
3 to 7 months
24
4
9 to 14 kg
7 to 12 months
22
5
12 to 17 kg
12 to 18 months
20
6
15 kg and up
18 to 24 months
18
When to move up a size
Move up a size when:
- The nappy is leaving red marks on the thighs or waist
- The tabs are overlapping less, or barely reaching the front panel
- You're seeing more leaks at the legs than usual, especially overnight
- The bub has filled out the front panel completely, with the wetness indicator line sitting close to the top
- The bub is approaching the top of the current weight range and starting to crawl, pull-stand, or move more
It's better to move up a size slightly early than slightly late. A nappy that's even a bit too small is uncomfortable and prone to leaks. A nappy that's a bit too big still works.
When to switch to nappy pants
Most parents switch from tape nappies to nappy pants somewhere between Size 3 and Size 4, when the bub starts crawling, pulling to stand, or actively resisting nappy changes. Pants pull on like underpants and are easier for an active bub. Pants also pair better with toilet training when that begins.
Some parents prefer tapes at night and pants during the day. That's a perfectly normal approach. Both formats are independently Dermatest® Sensitive Skin certified and use the same SeriPro™ silk-protein topsheet for a soft, smooth feel.
Trial Packs for testing fit
If you're between two sizes, a Trial Pack is the lowest-cost way to test fit before committing to a full carton or a subscription. Trial Packs include three packs of the same size. If the fit isn't right, you can switch to a different size on your next order without committing to anything.
What if my bub doesn't fit?
If you've ordered a size that doesn't work, email us at hello@littlepuggles.com.au with your order number and we'll help you swap to the right size. We're permissive on first-bag fit issues. We'd much rather help you find the right size than have you give up on the brand because Size 3 was a touch too small.
Our 60-day satisfaction guarantee sets out the three ways we can fix it.
Subscribers: managing size transitions
If you're a subscriber and your bub is approaching a size transition, you can change your size before your next delivery, or skip the next delivery while you confirm the new fit. Email us and we'll sort it.
Need more help?
If you're not sure which size to choose, the bub is between sizes and you'd like a recommendation, or you've had unexpected fit issues, email us at hello@littlepuggles.com.au with the bub's current weight, current size, and what's not working. We'll come back with a recommendation, usually within a business day.
Our FAQ covers the questions we get asked most.