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Rodent Sizing

Sizing:


Mice:

 

Age

Weight

Length*

Equivalent

Mice Pinkies

1-5 days

0.5-3 grams

0.5-1"

 

Mice Fuzzies

6-13 days

3-6 grams

1-1.5"

Rat Pinkie

Mice Hoppers

2-3 weeks

7-12 grams

1.5-2"

Rat Fuzzie

Weaned Mice

3-4 weeks

13-18 grams

2-2.5"

Rat Fuzzie

Large Mice

4-6 weeks

19-25 grams

2.5-3"

Rat Pup

X-Large Mice

6 months +

30 grams +

3" +

Weaned rat


Rats:
 

Age

Weight

Length*

Equivalent

Rat Pinkies
1-6 days 3-8 grams 1-2" Mouse Fuzzie
Rat Fuzzies
7-13 days 9-20 grams 2-2.5" Hopper or Weaned Mice
Rat Pups
2-3 weeks 21-30 grams 2.5-3.5" Large Mouse
Weaned Rats
3-4 weeks 31-45 grams 3.5-4.5" X-Large Mouse
Small Rats
4-6 weeks 46-79 grams 4.5-6"  
Medium Rats
6-8 weeks 80-149 grams 6-8"  
Large Rats
8-10 weeks 150-265 grams 8-9" 1/2 lb Rabbit
X-Large Rats
Adult Rat 266-360 grams 9-11" 1 lb Rabbit
XX-Large Rats
Adult Rat Over 361 grams 11" + 1.5 lb Rabbit

* Length does NOT include tails.

Rabbits :
 

Age

Weight

Equivalent

X-Small Rabbits
2-3 weeks 0.50-0.75 lbs Large Rat
Small Rabbits
4-6 weeks 1.25-1.5 lbs X or XX-Large Rat
Medium Rabbits
7-10 weeks 2-4 lbs  
Large Rabbits
2.5-3.5 months 4-6 lbs  
X-Large Rabbits
3.5-6 months 6-8 lbs  
XX-Large Rabbits
6 months + 8 lbs +  

As a side note not all conditions above will be met on every animal. In such cases it is standard to go by weight.

Size equivalents or interchangeable prey.

These items are based solely on girth.
  • Fuzzie mouse = Small Pinkie Rat
  • Hopper or Weaned mouse = Rat Fuzzie
  • Large Mouse = Rat Pup
  • X-large mouse = Weaned rat
  • Large Rat = 1/2 lb. Rabbit
  • X-Large Rat = 1.5 lb. Rabbit