Daggers
This category has a more historical and collectible character than the short name suggests. Alongside a Scottish dirk, it also includes main gauche pieces, a stiletto and models with more decorative fittings. That matters because with objects like these, impression depends not only on blade length but also on the proportions of the guard, grip, sheath and overall finish. In practice, two daggers of similar size can look completely different once they are in hand.
Category data repeatedly shows weights around 255 or 340 g, and blade thickness in several models reaches 4.5 mm. Overall length for part of the selection goes beyond 43 cm, so these are not tiny props. If the goal is to match a period, costume or display set, check the exact model name and detailing separately instead of assuming one piece will mirror another from a similar photograph.
Details worth comparing
It helps to compare blade shape, sheath style, metal finish and whether the dagger is meant to stand alone or sit beside a larger collection. Handle design is especially important here because it often defines the final character of the piece.
For storage, a dry place and a stable base are the main points, particularly when the dagger goes into a cabinet or onto a stand. The sheath and metal fittings are worth inspecting from time to time for looseness, discolouration or rubbing. That routine is usually enough to keep a collectible dagger looking right over time.