I purchased these for my 6 year old daughter.  She is very petite even for a 6 year old so I was worried they would be too big.  They are not, they are absolutely adorable and perfectly appropriate for her.  As other's have said, I do not think they would be as fitting on an adult.  Note these are also my daughter's first pair after the starter pair (ones her ears were pierced with) and there has not been any problems due to the materials, weight, etc.