A clearer width identifier
The D (M) wording supplies information missing from several generic Lansing listings. It helps a repeat buyer match an existing medium-width pair, but it does not give the cap’s internal measurements. If the shoe is correct in length but presses at the outer toes, another width or last deserves consideration before an extra length is ordered.
Compare the size 12 description with the label in your existing KEEN pair rather than depending only on the name Lansing. A previous pair may have been a Low or another generation, and its fit experience should not be treated as a guaranteed result for a waterproof Mid.
Model evidence and working conditions
The primary Raven/Tawny Olive page establishes waterproof Lansing Mid construction and steel-toe identity. Those facts support considering it for wet-weather work where this height is allowed. They do not prove puncture-resistant soles, metatarsal coverage or a winter insulation level. Those are separate features a job might require.
If water protection is unnecessary and the role permits a shoe, Lansing Low makes a useful comparison because the opening and upper coverage change. If a more structured original KEEN boot is the goal, review Pittsburgh separately rather than assuming its size-12 fit would be identical.
Matching the size-12 medium offer
Several Lansing Mid offers leave the size out of the initial title. They are alternate listings to resolve at the retailer, not evidence of more independent choices. This listing is most useful when 12 medium in this color is the selection you actually need. Confirm stock, seller and selected width together before comparing its offer with another Lansing page.