The pen weighs 21g with cap and 11g without it. (ink not included)
Overall lengh without the cap is 13cm and with the cap it is: 16.7cm
In capacity of the Eco is: 2.5ml of ink
ECO-T has a slightly more pronounced grip section; to help with learning correct writing posture for kids, new enthusiast, and anyone who likes a little bit more structure to the grip area. Cap and end cap also has a rotary triangular shape design.