Here is a link that describes and shows by picture the determining factors in whether a rattie is a Type A (long legs) or Type B (shorter legs).

http://www.nrta.com/newratstandards5.html

Nora - We need to see some new pictures of Bailey, and Buster, Hoss, Lil Bit.....

Max is an A/B   Short , long length and stocky

Yep - whether A or B type!  I love this description of them.

rita is definatly a type B with her  her short crooked legs

That was very helpful - Jack is definately a Type B Mini

The only thing I objected to was considering a full tail a "fault" - I understand the concept for showing a dog, but I just could not do that to a baby! Jack has a full tail & I just love the way it stands straight up and curls in a semi-circle when he is happy...

I have a B-body Rattie.  The other 4 are A's.  My little Sandy is the B type and I call her my little tank!  LOL

Sue in NY

I don't know why the NRTA says it is a fault.  Here is what the UKC website says, and the curl is perfect too!

Tail

The tail is set on at the end of the croup. A docked or natural bob tail is preferred, but a natural tail is not a fault. Docking should be between the second and third joint of the tail. he natural tail is thick at the base and tapers toward the tip. When the dog is alert, the tail is carried in an upward curve. When relaxed, the tail may be carried straight out behind the dog.

Faults: Bent tail; ring tail.

Thanks for clearing that up, Tracey.  Being new to the breed I was really wondering what Type A & B meant.