If you feed it the right amount they should only weigh in between 5 and 8 ounces mine are adults and are hardly 5 ounces.
For fancy mice, it's a bit much, but not unusual, especially if it's a big mouse. 25-50 grams is normal for a fancy mouse (1 ounce=28 gram). Adipose mice can weigh up to 100 grams, but that's definitely not healthy.
Depends on the shop and how 'fancy' the mouse it. But if you want a very fancy one you will have to pay quite a bit and their usually hard to find breeders.
Adults weigh 16 to 20 ounces. The weigh will vary some for different individuals.
Adults average two to four pounds, but can be much larger.
Adults weigh around 55 grams while newborns weigh 1.5 grams.
Adults generally are 40 to 80 pounds. Larger individuals weigh up to 120 pounds.
A typical mouse weighs anywhere from 20 to 50 grams, which is equivalent to 0.02 to 0.05 kilograms.
A mouse weighs 16-27 grams (0.6 - 1 ounce).
Flatback sea turtles typically weigh between 70 to 100 kilograms (154 to 220 pounds) as adults.
Adults can weigh as much as 20 oz (up to 600 grams)
The larynx typically weighs around 25-30 grams in adults.
I have mice and no real mice are fancy but i buy just normal mice mix at the pet shop. Mostly Mice can just eat about anything but DON'T GIVE THEM CHEESE IT IT BAD FOR THEM! Hope this can assist you on your questions THANK YOU KIND REGARDS.