you can check its product catalog for the size and see if it suits you
http://www.o3baby.com.hk/
my bb also sleeps on 0/3 bb cot and it's just excellent
護協 stopped selling 0/3 baby products
since 2 years ago
but if time allows, you can wait until
JUSCO and Wing On on baby sale, sometimes
they offer 20% off too