| Age | Blade size and type | Uncuffed tube size (mm ID) | Cuffed tube size (mm ID) | Stylet size | Insertion depth (cm) |
| Newborn | 1 straight | 3-3.5 | N/A | Pediatric | 9-10 |
| 6 months | 1 straight | 3.5-4.0 | 3.0-3.5 | Pediatric | 11-12 |
| 1 years | 1-1.5 straight | 4.0 | 3.5 | Pediatric | 12 |
| 2 years | 1.5-2 straight | 4.5 | 4.0 | Pediatric | 13-14 |
| 5 years | 2 straight or curved | 5.0 | 4.5 | Pediatric x 2* | 14-15 |
| 8 years | 2 straight or curved | 6.0 | 5.5 | Adult | 16-18 |
| 10 years | 2-3 straight or curved | 6.5 | 6.0 | Adult | 18-20 |
| 12 years | 2-3 straight or curved | 7.0 | 6.5 | Adult | 20-21 |
| 15 years | 3 straight or curved | 7.0 | 6.5 | Adult | 20-21 |
