Age guesstimate based on weight?

[syrcaid]

We took in my two baby ratties today to the vet office I work at. They have mites. We weighed them and they are 55 grams and 68 grams. To give you an idea, they are about the size of a full grown mouse. Around what age would that put them at?

 

[eagle]

I would guess at about 3-4 weeks maybe. Do you have pics of them?

 

[jorats]

Pics would help.