Congrats on your new baby and welcome to YT!!! You will learn a lot here once you have time to browse the site..As for your question my breeder gave me a list of items for bringing home my first yorkie!! Do you know the size of her mom and dad?? That might give you an indication..how much does she weigh now??? My baby uses a playpen which has enough room for his bed, food, and wetting pad....he is only about 3lbs @ 7 months and he has plenty of room when he is home alone!!! which thankfully is not that often!!!
hope this helps some and I know you will get plenty of advice from the more seasoned yorkie owners here who are a big help to new owners like us!!!