It is the same size as suzukis. A bad fit for a car that is much above 1000cc. In my experience with the previous model city with the same battery size, I always faced battery issues much sooner compared to my corolla with the normal ags65 battery, even though both cars are 1300cc. Good thing about 6th gen is that the battery tray is at least big enough now for the usual 65 batteries, in previous gen you were stuck with the small battery because of the tiny tray.
Another point I remembered, sometimes after a long drive my city is difficult to start, corolla never faces that issue. Both cars have sound systems installed, corolla has a more powerful one. So the extensive usage of sound system even with the engine on also causes battery issues because of the tiny battery.
People bringing up international markets having same size products are forgetting that there is a big difference in the quality of local and international products. Local euros 175s are never gonna have the same grip as imported 175s. Local batteries never have the capacity or cca that the international same sized batteries have. So in my opinion it is better to have oversized stuff to compensate for the local quality. Like atlas could have used the bg trakko 185/60r15 like the yaris to at least improve the low grip issues of the city.