We are manufacturing and exporting high quality foam cervical collars.
The foam cervical collars specification as following,

Shaped for comfort and to give the correct support to help relieve the pain suffered from whiplash, stiff neck and muscular tension.
Made from high density closed cell foam (100D) for better support, have a woven covering. Available in 3 sizes; small, medium and large.
Small: Length 44cm; Width: 9cm;
Medium: Length 48cm; Width: 10cm;
Large: Length 53cm; Width: 11cm;

Thanks and Best Regards,
Kelvin Yu
Shanghai Joy Crown Industry Co., Ltd
Rm 220A, Bld.11-C, No.613 EShan Road,
Pudong New Area, Shanghai 200127, China.
Tel: +86-21-58751019
Fax:+86-21-50907607
Email: sales@joycrown.com
Http://www.medical-gauze.com