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Endotracheal Tube Size Chart (Adult, Pediatric & Neonatal)
Selecting the correct endotracheal tube (ETT) size is critical for safe airway management during anesthesia, emergency intubation, and intensive care.
This guide provides:
- Adult ETT size chart
- Pediatric ETT formula
- Neonatal tube size reference
- Cuffed vs uncuffed comparison
- Intubation depth guidelines
- Bulk supply specifications for hospitals and distributors
| Patient Type | Recommended Internal Diameter (ID) |
|---|---|
| Adult Female | 7.0 – 7.5 mm |
| Adult Male | 8.0 – 8.5 mm |
| Large Adult Male | 8.5 – 9.0 mm |
Clinical Notes:
- Larger sizes reduce airway resistance.
- Smaller sizes may be required for airway narrowing.
- Cuffed tubes are standard for adult patients.
(Age in years / 4) + 4
(Age in years / 4) + 3.5
| Age | Uncuffed ID | Cuffed ID |
|---|---|---|
| 1 year | 4.0 mm | 3.5 mm |
| 4 years | 5.0 mm | 4.5 mm |
| 8 years | 6.0 mm | 5.5 mm |
Depth Formula (Oral Intubation):
ETT depth (cm) ≈ Internal Diameter × 3
| Weight | ETT Size (ID) |
|---|---|
| < 1 kg | 2.5 mm |
| 1–2 kg | 3.0 mm |
| 2–3 kg | 3.5 mm |
| > 3 kg | 3.5 – 4.0 mm |
Neonatal tubes are typically uncuffed.
| Feature | Cuffed ETT | Uncuffed ETT |
|---|---|---|
| Air Seal | Yes | No |
| Used in Adults | Standard | Rare |
| Used in Pediatrics | Increasingly common | Traditional |
| Aspiration Protection | Better | Limited |
Modern low-pressure high-volume cuffs reduce mucosal injury risk.
Medical-grade ETTs typically include:
- Medical PVC construction
- Radiopaque line for X-ray confirmation
- 15mm universal connector
- Murphy eye
- Clear tube marking
- Depth scale printing
- Sterile single-use packaging
As a B2B medical consumables supplier, TICARE HEALTH provides:
2.0mm – 10.0mm ID (Full adult, pediatric, neonatal range)
- Cuffed Endotracheal Tubes
- Uncuffed Endotracheal Tubes
- Reinforced (Armored) ETT
- Preloaded stylet options
- CE Certified
- ISO 13485 Manufacturing
- Sterile EO Processed
- Custom branding
- Custom packaging
- Multilingual IFU support
Serving hospitals, distributors, and government tenders worldwide.
→ Request Wholesale Quotation for Bulk Orders
The most commonly used adult ETT sizes are 7.0–7.5 mm for females and 8.0–8.5 mm for males.
Use the formula: (Age ÷ 4) + 4 for uncuffed tubes, and (Age ÷ 4) + 3.5 for cuffed tubes.
Neonates under 1 kg typically require a 2.5 mm tube. Full-term newborns usually require 3.5–4.0 mm.
Insertion depth (cm) is approximately 3 × the internal diameter of the tube.
For complete airway management supply, explore:
- Endotracheal Tubes (Cuffed & Uncuffed)
- Reinforced Endotracheal Tubes
- Laryngeal Mask Airway
- Suction Catheters
- Anesthesia Breathing Circuits
- Laryngoscope Blades & Handles
Ideal for:
- Operating rooms
- ICU reference boards
- Ambulance kits
- Training centers
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