Polar FT4 question

Lulzaroonie

It's my birthday in less than a month now, and my other half is buying me my HRM watch, after about 8 months of me sending him hints and suggestions.
I have a question about the chest strap.
Is it one size fits all and adjustable? Or do they come in sizes and you need to specify upon buying?
I'm obviously using it to help with my workout, and so wouldn't want to get one that would fit me now, but fall down later.
Currently, my chest is 36-38 inches on average, so would the strap be adjustable? Or what size would I need to get?

pinkraynedropjacki

One size, it adjusts.