They will tell you not to. Get it anyway. Substantial pieces that sit in a living room for years — the kind of thing used every evening and mentioned every visit, by people who never buy anything for themselves.
No size to guess, no exchange to manage, nothing to set up. All one size, all natural fiber — wool, lambswool and cashmere, or baby camel hair.
Murmurs makes open-front wool and cashmere capes, wraps, vests, and blankets, designed to be worn while working from home and out of the house — comfortable enough to rest in, presentable enough to be seen in. One size, no closures. Founded by a former tech designer.