Head/hat Size Chart - knitted or crocheted hats

Head/hat Size Chart - knitted or crocheted hats should be made about 1- 1 1/2" smaller around than the head circumference, as the hats should stretch and sizes are not an exact science! If you make it, someone will fit into it. =)

IMPORTANT! * Height given here is measured BEFORE you turn the brim up - from the bottom of the hat to the center top of hat. (This is NOT the actual height of the head as measurements assume you will be turning up a brim.) Hats can be made taller if you want a larger brim to fold up.

On newborn hats I plan to fold up about 1" for a brim, on adult hats I usually figure 2" - 3" or so for a brim, but this varies according to personal preference.

Preemies (I have been told by many NICU nurses that Bev's Baby Ribs hat ideal hat to knit for preemies and newborns because it has so much stretch and will fit several sizes of babies.)

1 - 1.5 lbs (Babies born between 23-25 weekers fit within these weights)
Baby's Head Circumference is 7" - 8" 18 - 20 cm (so hat circ. should be about 6" - 6.5" 15.5 - 16.5 cm) Height of hat should be 3" - 3..25" 8 cm

2 lbs 1kg (Babies born between 26-27 weeks fit within these weights)
Baby's Head Circumference is 9" - 10" 23-25 cm (so hat circ. should be about 7.5" -8" 18.5 -20 cm) Height of hat should be 3.5 - 4" 10cm

2 - 3 lbs 1.4 kg (Babies born between 27 - 31 weeks fit within these weights)
Head Circumference 10" - 11 1/4" 25-28 cm hat circ = 8.5" - 10" 22-25 cm Hat height = 4" 10 cm

4 - 5 lbs 2 kg (Babies born between 32 - 34 weeks fit within these weights)
Head Circumference 11 1/2" - 12 1/2" 28-33 cm hat circ = 9" - 11.5" 23-28 cm Hat height = 4 to 4.5" 10-11cm

5 1/2 - 6 lbs 2.7 kg
Head Circumference 12 1/2" - 13" 31-33 cm hat circ = 11" - 12" 28-33 cm Hat height = 5 to 5.5" 13-15 cm

Newborns
Head Circumference 13" - 14 " 33-36cm; hat circ = 11.5" - 13" Hat height = 5.5 to 6" 13-15 cm

Baby - 3 to 6 months
Head Circumference: 14" - 17 " 36-43 cm; Hat height= 6.5 - 7" 15-18 cm

Baby - 6 to 12 months
Head Circumference: 16" - 19 " 41-48 cm ; Hat height = 7.5" 18 cm

Toddler - preschooler (12 months - 3 years) Head Circumference: 18" to 20 " 46 -48 cm; Hat height = 8" 20 cm

Child (3 - 10 years)
Head Circumference: 19" - 20 1/2" 48-51 cm; Hat height =8.5" 22cm

Pre-teens and Teens Hat
Head Circumference: 20 1/2" - 22" 53 -56 cm; height 9-10" 25 cm

Adult Woman
Head Circumference: 21.5" - 22.5" Hat height = 11"

Adult Man
Head Circumference: 23" - 24" 58.4 cm - 61 cm; Hat height = 11"-11.5"