Table 1.

Recommended tube sizes for pediatric patients.

Age	Uncuffed Tracheal Tube	Cuffed Tracheal Tube	Age	Microcuff® Tracheal Tube
	Modified Cole’s Formula	Motoyama Formula
	ID = (Age/4) + 4	ID = (Age/4) + 3.5
term-1 year	3.5 mm	3 mm	term to < 8 months	3 mm
<2 years	4 mm	3.5 mm	8 months to < 2 years	3.5 mm
<4 years	4.5 mm	4 mm	<4 years	4 mm
<6 years	5 mm	4.5 mm	<6 years	4.5 mm
<8 years	5.5 mm	5 mm	<8 years	5 mm
<10 years	6 mm	5.5 mm	<10 years	5.5 mm
<12 years	6.5 mm	6 mm	<12 years	6 mm
<14 years	7 mm	6.5 mm	<14 years	6.5 mm
<16 years	7.5 mm	7 mm	<16 years	7 mm