Share 'Child Glove'

Hi, all,   Thanks for letting me KAL with you. I'm wanting to make a first glove (my first) for my 4-year old grandchild. But he lives too far away to measure his hand myself. Any suggestions? What are the absolutely least measurements I need to make a glove that will fit his hand? Do you measure each finger and thumb or what?   Thanks!   Sincerely, Amy