"nicely curved" is a correct and usable phrase in written English.
You can use it when you would like to describe an object or feature as being rounded or flowing in a pleasing way. For example, "The artist's painting featured nicely curved lines."
The women: notice how beautiful, soft, nicely curved, smooth, tender, smart, loving, nice-smelling and attractive they are to you.
Cramped, but nicely curved walls which fit into the overall art deco layout of the building.
The Pixel feels great in the hand, with nicely curved edges and flat sides that make it easy to grip and hold on to.
Your arms should be nicely curved and down in front of you.
The cell body of neuron 4L-III was situated within one of the curvatures of a patch compartment, and its dendritic field curved nicely along the border of the compartment conforming to the geometry of this compartment resulting in a strongly asymmetric orientation of the dendrites related to the cell body (Fig. 8).
A powerful beast, the Citan also looks pretty good, with its panels curving nicely around from the roof to the wheelbase.
As you stitch down the bracelet make sure that the pattern is curving nicely and looks like a spiral staircase.
The Moto E is also relatively thick at 12.3mm deep, but its curved back fits nicely in the palm of the hand.
At 9.9mm, it is significantly thicker than an iPhone 6 (6.9mm) or Samsung Galaxy S5 (8.1mm), but the curved back fits nicely in the hand and the tapered edges make it feel a lot thinner.
Leave about a centimetre down from the shoulders (enough room for the arms to start nicely at least) and draw two slightly curved lines coming in.
The curved back fits in the hand nicely, and it is still very solidly built with no flex or give in the body.
