[djmcmath]

Ok ... I have no idea how to tell what size this is. There's no standard "Size" tag, like you'd find in a t-shirt or anything. I've looked for some way to tell what size it is, based on the markings, and can't seem to make any sense of it.

Here are the dimensions:
- At the wide point of the neck: 5.5"
- At the narrow point: 4.25"
- At the bottom of the "arms": 4.5"

Here are the detailed markings:
- Bar code, with serial number: Y20MSII/OK/12061 (This seems to identify it as a HANS MS-II 20 Series, I believe)
- SFI sticker: sfi logo, "This Manufacturer Certifies That This Product Meets SFI SPEC 38.1" with holes punched for Date of Manufacture (as opposed to Recertification), April, and 2014.
- Sewn tag on left strap: "APPROVED Standard 8858-2010 --- SFI Spec 38.1 -- HANS Performance Products 2014, then a black V on an orange background, with an arrow across the top of the V.
- On the back, the "hans sport II" logo.
- Also on the back, a sticker with the manfacturer's address (in Georgia), and a warning that the user assumes all risk for use of this product.
- Also on the back, molded into the plastic, "Hans 20 MS II" and the recycling code 7.

Hope that helps.