Reply to Kindergarten or first grade?

I would put her in Kindergarten, but not because she doesn't know her sight words or any other academic concerns. But rather because Kindergarten is when things like learning basic classroom behaviors happen: sitting in a circle, raising your hand, taking turns, standing in line, etc. If you put her in 1st grade and she struggles, you will worry you made the wrong decision, but I think it's never a mistake to give them an extra year of childhood.