STAEDTLER triplus® roller

Went to get colour pens just now at Popular bookstore. There were just too many pens and I could not decide which to invest my money on... So I went to Google and read the reviews...
There were not many reviews... So, for people like me, I decided to blog about pen today!:) STAEDTLER triplus® roller.

There's 10 in 1 pack 

It actually looks bigger than the rest. 

1. STAEDTLER's triplus® roller 

2. PILOT's G2 (0.5mm) 

3. PILOT's G-TEC-C (0.4mm) 

4. uniball SIGNO DX (0.38mm) 

Is it because it's water-based ink so it looks thicker? Anyway, hope this review helps you when you are deciding:)