You know the feeling. You come across a Mishna or Gemara which mentions terms like סלע, פרסה, or פונדיון. Wouldn’t it be great to have a reference to all of those at your fingertips? 
 
Now you can!
 
Keep this bookmark in your Mishna or Gemara for those mathematical sugyas. 
The bookmark includes the conversions in Shas for:
Length 
Currency
Area
Volume