Thor sentenial chest protector HELP! for a girl?

the sentinel is going to be tough to fit. the adult one will be probably go small enough for you, but they're cut pretty flat. Thor makes a quadrant in women's, that might be worth checking out. Fox makes one too, and alpinestar makes a "stella" armoured shirt for women if you are into that. the bicep armour is removable if you just want the roost guard, but the big shoulder pads are kinda stuck on there. I wear a quadrant when I race though, and I really like the extra coverage when I get hit by a rock or leave my bike while it's moving. Try one on if you can, and see if you like it