The option to have tracking on your order is most certainly available!
Both Standard with tracking and Express include tracking. However, please be aware that the former is only available for orders which total weight falls under 2kg. The latter is available no matter the total weight of your order, but also note that Express becomes the only shipping option available if the total weight is 2 kg or more.
The regular Standard shipping option does not include a tracking number.
All weight is calculated automatically before going into the checkout screen, and the price of shipping will reflect the weight calculated.