M 32-38cm (Neck circumference) 1. The neck support is made of 2cm elastic sponge, which not only fits the neck perfectly but is also comfortable for long periods of wear. Soft support is incorporated in the center, ensuring the comfort of the neck support while also doubling the support and reducing pressure on the neck from the head. TSB Neck Support Neck Corset (Built-in Support Bar) Cervical Spine Neck Corset Cervical Collar Cervical Soft Thin Sleep Home Use Work Unisex With Dedicated Washing Cover Gray M 17998-23 ⊹ ࣪˖ ┈┈ ˖ ࣪⊹ ┈┈⊹ ࣪˖ ┈┈˖ ࣪⊹ Check out other products ˊ˗ ☞ #RitzShopOtherProductsList ⊹ ࣪˖ ┈┈ ˖ ࣪⊹ ┈┈⊹ ࣪˖ ┈┈˖ ࣪⊹ ○ Items may be shipped without the box ( ˘¯˘ )ᐝ ○ If I am not familiar with the product, I may not be able to answer questions, but please feel free to comment if you have any questions ✨️