Sure. I use this chart:
Yorkshire Terrier - Yorkie Puppy Growth/Weight Chart - watch us grow
Go down to where it says
11 weeks (the age of your puppy now); then follow across til you find the weight. Your pup is 1.72 lbs, multiply that by 16 to get the number of ounces, which is
27.52 ounces. I rounded up to the next full number
28 ounces. Now follow that column down to where it says
18 months -- that is considered adult weight. You will see
4 pounds. So, the GUESSTIMATE for your pup's adult weight would be 4 pounds.
Hope that makes sense.