The spider is small, with a body length between 6.9 and 8.65 mm (0.27 and 0.34 in), the female being generally larger than the male.

It is distinguished by the two brown lines that stretch across the back of its carapace and abdomen that is recalled in its Korean name.

[6] In 2003, Wayne Maddison and Marshall Hedin identified a phylogenetic relationship between nearly 800 species of jumping spider, which they grouped together as Plexippoida.

[8] It was allocated to the subclade Simonida, named in honour of the French arachnologist Eugène Simon.

[12][13] Prószyński suggested that spiders identified as Helicius kimjoopili found in Korea are in fact members of this species.

[15] The spider's body is divided into two main parts: an elongated cephalothorax and an oval abdomen that is narrower to the rear.

The carapace, the hard upper part of the cephalothorax, varies between individual examples, with some being orange or yellow-brown and others dark brown.

The topside is yellow and has a marking of two brown stripes stretching down from front to back and a zigzag pattern on the edges.

[16] The spider was observed living in the cities of Chongjin in 1987 and Pyongyang in 1990, the latter near the Tomb of King Tongmyong.

[23] The first example of Plexippoides regius to be found in Russia was discovered in Primorsky Krai in 1979 but was not identified as being of this species until 1984.

In 2002, specimens were collected in Henan, being discovered in Baligou, Huaiheyuan National Forest Park and the regions around Mount Song.

It has also been found in Dengfeng, Huixian, Xinyang, Linzhou, Luanchuan, Lushi, Neixiang, Songxian Jiyuan and Yiyang.

[26] Outside Henan, the spider has been spotted in Beijing and the Chinese provinces of Anhui, Hebei, Hubei, Jilin, Shanxi, Sichuan and Zhejiang.