How to determine your CPD Ballistic Helmet Size
- Using a cloth tape measure placed in the center of your forehead, measure all the way around your head.

- Write down the result in inches or centimeters.
- Use the sizing chart below, and convert your measurement to the nearest helmet size.
HAT SIZE
|
INCHES
|
CENTIMETERS
|
HELMET SIZE
|
5 1/2 - 6 1/4
|
18" - 20"
|
46 - 50
|
SMALL
|
6 1/4 - 7
|
20" - 22"
|
50 - 56
|
MEDIUM
|
7 - 7 5/8
|
22" - 24"
|
56 - 61
|
LARGE
|
7 5/8 - 9
|
24" - 26"
|
61 - 66
|
X-LARGE
|
*In some cases helmet sizes will vary between the Seer S1602IV (Current) Riot Helmet and the Seer S1711 (New) Ballistic Helmet. For example:
- An officer whose hat size is 7 1/4" would have worn a MEDIUM in the Seer S1602IV Riot Helmet. This officer will now wear a LARGE in the Seer S1711 Ballistic Helmet. However an officer whose hat size is 7" will wear a MEDIUM in both the Seer S1602IV and the Seer S1711.
- An officer whose hat size is 6 3/4" would have worn a SMALL in the Seer S1602IV Riot Helmet. This officer will now wear a MEDIUM in the Seer S1711 Ballistic Helmet.
- An officer whose hat size is 7 3/4" would have worn a LARGE in the Seer S1602IV Riot Helmet. This officer will now wear a X-LARGE in the Seer S1711 Ballistic Helmet.
S1711-CPD Ballistic Helmet User's Guide
To download a copy of the User's Guide for the Seer S1711-CPD Ballistic Helmet, please click this link.