Vertigo milium, common name the blade vertigo, is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Vertiginidae, the whorl snails.

The "circumference" of the aperture is "made up of two curves of different radius uniting in the peristome, where the junction causes an angle projecting inwards, the smaller curve comprising about one-fourth part and forming the superior portion of the peristome.

The aperture has six teeth as follows: two sharp, projecting teeth of about equal size placed on the parietal wall and dividing that region into three nearly equal parts; one on the columella, large, massive, broad; a third placed on the outer lip above or at the junction of the two radii, long, curved, ridge-like, pointing directly between the two parietal teeth; a fourth on the base of the lip, small, conical, tubercular; and one large, entering, elevated, long lamina, which begins on the base of the lip and curves backward until it disappears behind the columella tooth (this is the "gular lamina" of Sterki).

Peristome is white or brownish-white, reflected, the terminations separated, but joined by a prominent callus.

There are four perfect lateral teeth and the first marginal tooth is similar but with a second outer cusp.

[2] Distribution of Vertigo milium include Illinois,[3] Maine to Minnesota, Ontario and Quebec, Canada, to Florida and Texas,[4] USA.