I've also never really tailored anything like this before so I was wondering how to go about cutting them down to size. A reference picture to what I need is this...

Thank you ahead of time ^.^
EDIT: Also, if there's any way I could add on to the longer glove with the fabric from the glove I'll be cutting... I just kind of realized Yoko's glove go ABOVE her elbow, the gloves I have end at my elbow =/ If not, then it's just a minor detail I'll have to overlook, but if there's a way, I'd love to know!