I know I'll probably have to make a few adjustments once I try it on her and baby Silas, but I think it's going to work out very well. In the photo, I'm supporting Lydia with my arms because I didn't tie the sash around, which you would use for bigger babies/toddlers. Lydia is actually only 31 lbs, so she isn't too big for this type of carrier, even though she's 4 1/2 years old. I will probably make a sling for myself when we get a referral, since it is advisable to carry your newly adopted child as much as possible, even if the child is 3 or 4 years old.
I found out about making this carrier here: http://pacountrycrafts.blogspot.com/2013/10/my-homemade-baby-carrier-wrap-thing.html
and I mostly used this tutorial: http://craftymamabakes.com/2011/05/05/homemade-baby-ktan/, although I bought 3 yards of 60" fabric. I had plenty of fabric, though I used the entire 3 yards' length for the sash. I am kinda wishing I had bought more of this fabric, though. It's really pretty and would make a nice shirt.