"narrow shape" is a correct and usable phrase in written English.
You can use it to describe physical objects that are thin or long and thin in appearance. For example, "The crystals had a beautiful, narrow shape that glimmered in the light of the sun."
A narrow shape is preferable, about 60 degrees (1/6 of a pie) and U-shaped, but V-shaped notches work too.
They're classic, but the narrow shape is completely modern".
OUTDOOR SPACE: The house is known as Longacre, named after the deep, narrow shape of the three-quarter-acre lot.
In addition, the narrow shape of the fuselage represents a volumetric constraint for the storage of the battery and typical cargo.
However, a high-aspect-ratio design may lead to mechanical (structural) instability of the storage space because of its tall, narrow shape.
But we said, 'No, we like this,' and we agreed on a basic narrow shape for the boats". Unlike other teams, where the designers worked in isolation from the crew, the New Zealanders made a family out of it.
The fashion message of the show was in the silhouette, which echoed the narrow shapes seen on the Chanel and Prada catwalks.
Second, under certain conditions, this technique can overcome difficulties that are encountered with traditional stirrers, such as accessing regions that are difficult to reach in working spaces with complex or narrow shapes.
The epidermal cell shapes of leaf blade in transverse section of A. variabilis show long and narrow shapes and its leaf margins are acute, which is different from the other morpho-types.
When children have opportunities to get into high, low, wide, and narrow shapes, they increase their flexibility (one of the five health-related fitness factors).
By the late 13th century the style of tracery evolved to include a greater number of narrow shapes that adapted easily to Gothic openings in combination with circular shapes as can be seen in the windows of the chapter house of York, the Octagon of Ely and the west window of Exeter.
