Bolt is 69.5"W (1765mm) and 164"L (4166mm) and weighs 3580.0# (1624kg)
i-MiEV is 62.4"W (1534mm) and 144.8"L (3678mm) and weighs 2579# (1170kg)
Bolt turning diameter is 35.4' (10,8m)
i-MiEV turning diameter is 30.8' (9,4m)
With a significantly larger and torquier motor, I must say that the extra 1000# (454kg) was not noticeable on the short test drive I took.
Edmunds.com is a good place to compare specs.
I personally would prefer a non-NA skinnier i-MiEV.
The Bolt does not feel like a large car.
Edit: added metric units
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV