Eco-Cha packaging sizes

Eco-Cha tea comes in 3 sizes: 

Small: 38 grams

Medium: 75 grams

Large: 150 grams 

These are common measurements in Taiwan. In Taiwan tea is measured in 'jin' which is 600 grams, and 'liang' which is 38 grams. Hence, 4 Liang = 150 grams which is a very common size here in Taiwan.