US Trends

what size nipple for newborn

For a newborn, you generally want the smallest, slowest -flow bottle nipple.

Quick Scoop

  • Most brands label newborn nipples as:
    • “Preemie” or “Extra slow flow” for premature or very tiny babies.
    • “Newborn” or “Level 0 / Size 0 / Slow flow” for full‑term newborns (0–3 months).
  • These have a very small hole so milk comes out slowly, which:
    • Matches a newborn’s weak sucking ability.
    • Lowers the risk of gagging, choking, or milk pouring too fast.

What size nipple for a newborn?

For a healthy, full‑term newborn (0–3 months):

  • Choose:
    • “Slow flow,” “Level 1,” or “0+ months” nipple, depending on brand wording.
  • If your baby is:
    • Premature or easily overwhelmed by flow → look for “Preemie” or “Extra slow flow” / “Size 0 slow flow.”

Most standard newborn nipples that come in the box with bottles are already the correct size and flow rate for 0–3 months.

Signs the nipple size/flow is right

Likely the right size if:

  • Feeding takes about 15–30 minutes without obvious struggle.
  • Baby is:
    • Sucking rhythmically.
    • Swallowing smoothly.
    • Finishing feeds without extreme tiredness or frustration.

Consider that flow may be too fast if:

  • Baby is coughing, gagging, leaking lots of milk from corners of mouth.
  • Seems distressed, pulling off the bottle, or very gassy after feeds.

Flow may be too slow if:

  • Baby falls asleep very quickly every feed yet seems still hungry.
  • Feeds take a very long time and baby gets frustrated.

Simple age-based guide (typical)

This is general; always follow your baby and your pediatrician:

  • 0–3 months: Extra slow / Preemie (if needed) or Newborn / Slow flow / Level 1.
  • 3–6 months: Medium flow / Level 2 (if baby seems ready).
  • 6+ months: Faster flow (Level 3–4) depending on solids and intake.

Important safety note

If you’re ever unsure—especially with a preemie, baby with medical issues, or frequent choking/gagging—check with your pediatrician or a lactation consultant for individualized advice. They can watch a feed and help you confirm the best nipple size and flow for your baby.

Information gathered from public forums or data available on the internet and portrayed here.