When deciding on size, you need to take into consideration what you want from a dog and your circumstances.
For instance:
What do you want from a dog: Ask yourself:
A. Do I want my dog to be in dog sports like agility and flyball?
OR
B. Do I want a dog to cuddle with?
A. Do I travel a lot, and am unable to take a dog along?
OR
B. Do I like to travel sometimes or maybe a lot and have no problem taking a smaller dog along?
A. Am I an active person who wants to do activities with my dog?
OR
B. Am I a somewhat active person and I can't take my dog out very often?
A. Do I have small children or plan to have a family in the near future, or I have young nieces, nephews, and cousins and want a dog who is friendly wiht small children?
OR
B. I don't have small children and do not plan to have any in the future and not many or none at all come to my house?
If you awnsered every question and most of your awnsers were A's the standard is the Dachshund for you. But if most of your awnsers were B, your best bet is a mini! But if you got both A's and B's , either size, or maybe a tweenie, is a great choice.