Gain weight, where?

So I've always had skinny fingers but for awhile, my engagement ring has not fit me. When my fiancé proposed, I weighed about 138lbs and I wore a ring size 6. Now, two babies later, I weigh about 168lbs but my fingers look the same size to me. Can you gain weight on your fingers?? I'm sad because I haven't been able to wear my engagement ring for about a year now. ☹