Words referring to the shape of Chinese characters
金-shaped


金字塔 Pyramid (Because the shape of a pyramid looks like 金)

田-shaped


田字格 grids with the arrangement like 田

工-shaped


工字梁 I-beam
工字柱 I-column 

米-shaped


米字旗 the national flag of UK

之-shaped


之江 another name of Qiantang River, because its course looks like the shape of 之

井-shaped


井形格床 two-way grillage
井号 hash sign

人-shaped


人字队 in V formation (for example for birds)
人字鞋 flip-flops (the sandals)

一-shaped


一字队 in line formation (for example for birds)

丁-shaped


丁字路口 T-junction

十-shaped


十字路口 crossroads; intersection 

八-shaped


八字脚 splayed feet(normally when a man walks, the two soles are approximately parallel; however, someone would splay his feet when walking, so the two soles looks like a trumpet, the 八 shape)
八字眉 eyebrow arranged in the shape like 八(imagine the eyebrow of the Angry Birds)

国字脸, means a face looks like square
日-shaped


马走日 knight (in both Chess and Xiangqi) goes L, that is, two steps in one direction plus one additional step perpendicularly. In Xiangqi where pieces go along lines instead of squares, the starting and stopping position of a 马 (knight) forms a 日.

大-shaped


大字形躺在床上 lying in bed with arms and legs open (that person must be very tired)

品-shaped


品字结构的汉字 other Chinese characters whose structure is similar to 品, with three identical parts arranged in a triangle. e.g. 晶， 众， 鑫， 森 ...
品字形布局 a triangular arrangement. This may refer to anything, like three buildings, three wells and so on.

弓-shaped


弓着身子 hump his/her back

卐 or 卍-shaped


卐字旗 the flag of the Nazi Party

回-shaped


回字形建筑 a building with a large courtyard in the center.

川 shaped


川字腹肌 six-pack abs