The average size of a female hand is 6.8 inches. The average male hand size is 7.4 inches. To put this in perspective, the hand size of OBJ, who is just 5'11, is 10 inches!!!!
All that being said, I think we can assume this females hands is not more than 7.5 inches long. I am basing this off the fact that she doesn't appear to be that tall:
So, the one handed catch here...would it have been possible without the gloves on? Probably not. However, her approach was still admirable as we see she just stuck her hand straight in the air instead of doing that fake one-hand catch where you catch the ball on its way down on the perfect angle (this may not make sense to you, but it does to me).
I'd love to see her attempt this with no gloves on, but in the end, who really cares? Still a great job.
P.s. If you're a hot girl on Instagram and looking to increase your following, do something sports-related (golf swing, throw a football far, catch a football one-handed) and you will get posted on @BarstoolSports or a page similar to ours. Hundreds of thousands of horny dudes who like sports will then go to your page thanks to the kind folks who runs these pages (like myself) tagging you. 1-5% of them will follow you and then BOOM, your career is off to the races. That's not even including if somebody blogs the impressive athletic feat! It's a bulletproof plan.