Sizewise

Lakshya from Hanbury C of E Primary School and Alara who goes to FMV Ozel Erenkoy School both sent in correct solutions. Alara says:

The plane is 560 tonnes and its length is 73 m.
The boy's weight is 40 kg and he's 130 cm tall .
The beetle's (or perhaps it's a woodlouse?) length is 18 mm and its weight is 0.05 g.