Quick answer

Choose a cloth nappy size based on your baby's weight and body shape, not just age. For Beaming Baby organic bamboo nappies, start with Size 1 (Mini) for newborns and move up as your baby grows, using the fit around the waist and legs as your guide.

Why weight matters more than age

Babies grow at different rates, so age alone is not a reliable guide for nappy sizing. A chunky six-month-old may need a larger size than a slim one-year-old. Always check the weight range on the packaging and compare it with your baby's current weight.

Also consider body shape: some babies have rounder tummies or thicker thighs, which can affect the fit even within the same weight range. When in doubt, choose the size that gives a snug but comfortable fit without leaving red marks.

Signs your cloth nappy is too small or too big

A nappy that is too small will leave red marks on the waist or thighs and may cause leaks because the absorbent core is compressed. A nappy that is too big will gap at the legs or waist, leading to leaks and discomfort.

Check the rise (the distance from the waist to the crotch) and the leg openings. The nappy should sit snugly without gaps, and you should be able to fit two fingers comfortably between the nappy and your baby's waist.

Decision rules for choosing the right cloth nappy size

  • Check the weight range: Look at the weight range printed on the nappy packaging and compare it with your baby's current weight. Choose the size that overlaps your baby's weight, not the one that just matches their age. Weigh your baby at each nappy change to track growth and anticipate size changes.
  • Assess the fit: After putting the nappy on, check that the waistband sits snugly and the leg elastics are flat against the skin. You should be able to fit two fingers between the nappy and your baby's waist, and the rise should cover the bottom without gaping. If you see red marks or gaps, adjust the size or try a different rise setting.
  • Watch for leaks and blowouts: If you notice frequent leaks or blowouts, especially around the legs or waist, the nappy may be too small or too big. Try the next size up or down to see if the fit improves. Keep a log of leaks to identify patterns and make sizing adjustments sooner.
  • Consider your baby's activity level: Active babies and toddlers may need a larger size to allow for movement and to prevent the nappy from shifting. If your baby is crawling or walking, ensure the nappy fits securely without restricting their legs. Choose a size that accommodates your baby's mobility to maintain comfort and leak protection.

Beaming Baby organic bamboo nappy sizes at a glance

  • Beaming Baby Organic Bamboo Nappies – Mini – Size 1: Beaming Baby Organic Bamboo Nappies – Mini – Size 1 is designed for the smallest babies, with ultra-soft bamboo waist and leg panels. This size is ideal for newborns and young infants, providing a gentle, comfortable fit that helps protect delicate skin.

    Beaming Baby Organic Bamboo Nappies – Mini – Size 1

    Beaming Baby Organic Bamboo Nappies – Mini – Size 1

  • Beaming Baby Organic Bamboo Nappies – Midi – Size 2: Beaming Baby Organic Bamboo Nappies – Midi – Size 2 offers the same organic bamboo comfort in a slightly larger fit. As your baby grows, this size helps maintain a secure fit to prevent leaks while keeping the same soft, chemical-free feel.

    Beaming Baby Organic Bamboo Nappies – Midi – Size 2

    Beaming Baby Organic Bamboo Nappies – Midi – Size 2

  • Beaming Baby Organic Bamboo Nappies – Maxi+ – Size 4: Beaming Baby Organic Bamboo Nappies – Maxi+ – Size 4 is a larger size in the range, with the same bamboo waist and leg panels. This size suits older babies and toddlers who need more room while still providing the comfort and absorbency they need.

  • Beaming Baby Organic Bamboo Nappies – Junior – Size 5: Beaming Baby Organic Bamboo Nappies – Junior – Size 5 is the largest size in the range, with the same soft bamboo panels. This size supports toddlers who are potty training or need a larger fit, ensuring comfort and leak protection during active play.

Who should choose which size

Best for

  • Newborns and young infants who need a snug, gentle fit: Beaming Baby Size 1 (Mini)
  • Babies who are growing quickly and need a bit more room: Beaming Baby Size 2 (Midi) or Size 4 (Maxi+)
  • Toddlers who are potty training or need a larger fit: Beaming Baby Size 5 (Junior)

Not for

  • Babies who are between sizes or have a very slim build: consider trying a smaller size with a different rise setting
  • Parents who prefer a one-size-fits-all system: this range uses discrete sizes, so you'll need to buy multiple sizes as your baby grows