Hospitality stock answers a different question from branded apparel. Nobody chose it, nobody kept it deliberately, and it has to be right on the first wear because there is no second one.
Sealed, single, and obviously new
Every piece goes out in its own sealed pack. That is not a packaging preference; it is the only way a guest can see that the item is unused, and it is what makes the whole category acceptable in the first place.
Keep the pack itself plain and clean, with the property mark small. Loud branding on something intimate reads as a promotion rather than a courtesy.
Fewer sizes, wider fit
A property cannot hold a full XS to 4XL curve in every room store. The usual answer is three or four sizes cut with more stretch and a more forgiving rise, so each one covers a wider band than a retail equivalent would.
Soft combed cotton or bamboo is the safer fabric here. It suits every guest and every climate, and it does not carry the odour that cheap polyester develops in a warm room.
Packaging that survives the trolley
Packs are handled far more than retail stock: loaded into carts, stacked in linen rooms, carried down corridors. A flimsy sleeve arrives creased and looks second-hand before a guest ever sees it.
Specify a heavier sleeve or a rigid card backing, and ask for cartons split by size and labelled on the outside so housekeeping never has to open one to find out what is in it.