Shell very small for the genus but average for the group of Vexillum it belongs to. Solid and porcellaneous. Protoconch multispiral and raised with 4 glossy whorls. The transition to the teleoconch whorls is well defined. Color pale cream on top and darker towards the apex. Subsutural line below the protoconch is dark brown and deeply incised. The teleoconch whorls number 6. The body whorl covers about half of the shell length and the aperture is a little larger than one third of the shell length. The upper whorls are flatenned. the body whorl is convex with a straight siphonal canal. Outline of the upper whorls slightly concave on top. The suture is deep and very visible and wavy where the axial ribs meet the preceeding whorl. The sculpture consists of wavy axial ribs covering the whorls. There are 12 to 13 such axial ribs on the body whorl. Between these axials are tiny spiral cords that number 11 between the top of the aperture and the suture on the body whorl. These tiny spiral cords do not reach the top of the axial wavy ribs but reappear between each rib. On the lower part of the body whorl, on the siphonal canal, the spiral ribs become more prominent until they are dominant and the axial ribs disappear in that region. The aperture is small, not thickened, with a number of hardly visible lirae. These can only be observed by light shining through the shell. In both specimens, there is a structure parallel to the lip that looks like a break in the shell .There is a pink parietal thickening and the columella bears a thick columellar shield. On this columellar shield. 3 columellar folds. Behind the columellar shield, in the path of the upper columellar fold, appear pink knobs that run all over the shell to the dorsum. There are 5 to 7 such knobs.The siphonal canal is broad in shape but its aperture is narrow. The color of V.jeciliae n. sp. is complicated: the upper part of the whorls, on top of the axial ribs is a solid yellow patch. In the same region, between these ribs are pink patches. This color band of alternating pink and yellow is bordered by a dark brown irregular line. Mid-whorl, there is a pure white spiral zone. Below this white spiral zone, a yellow zone, followed by a pink zone, a yellow zone, a pink zone and yellow again towards the tip of the siphonal canal.

V.jeciliae n. sp. differs from V. diutenerum by its more solid shell, less stepped whorls, straighter siphonal canal and columella. The pattern is completely different: V. diutenerum is either dirty white or greenish with a dark band on the lower part of the last whorl. V.jeciliae n. sp. has a dark brown band below the suture arid a darker protoconch. A very similar coloration is found in V. suave, but this species is much broader in shape with much more swollen whorls and a red protoconch instead of yellow brown. V. charlesi is about twice the size of V.jeciliae n. sp.. has much straighter whorls and lacks the subsutural brown band.

The Philippines. Mactan Island. Punta Engano. Only known from the type locality. Both types were taken with lumun lumun nets, set at a depth between 15 and 60 m.