These are adorable little sunglasses - I like that they are super light and won't be heavy on my baby - I also like that they are polarized to offer maximum protection for the South Florida sun. They are too big for my 10 week old who is on the bigger side - 23 1/2 inches and 12 lbs for reference...but I think in another month or so they will be perfect! I am still undecided in the matte finish - I wish the black came in a non matte finish as well. They also come with a nice carrying pouch to protect them.
Update: Our son is now 14 weeks and they fit him perfectly!