A guest sink works best when the basics are easy to spot and easy to use. Start with the space you have, then choose a soap and a hand lotion that make sense together. You do not need a matching set.
Start with the counter
Measure the clear area beside the faucet before adding bottles. Leave room to turn the tap and set down a watch or ring without crowding the sink. If the counter is narrow, prioritize soap and keep lotion on a nearby shelf.
Choose the soap for the job
Check the label for the product type, scent notes, bottle size, and directions. APOTHEKE Canvas Liquid Soap is listed as a 10 fl. oz. liquid soap with a floral and marine-citrus fragrance. Its bottle is listed at 2.5 inches in diameter and 6.5 inches high. The product directions say to lather, cleanse, and rinse. Those facts help you judge fit and scent without guessing how it will feel in your own space.
Add lotion if it earns the space
APOTHEKE Earl Grey Bitters Lotion is also listed at 10 fl. oz. in a 2.5-inch-diameter, 6.5-inch-high bottle. Its stated scent notes include bergamot, black tea leaves, and lemon zest. Canvas and Earl Grey Bitters have different scent profiles, so read both descriptions if you want them together rather than assuming they match.
Make it easy for a guest
Put soap nearest the faucet. Place lotion where it will not be mistaken for soap, and keep the labels facing out. A small clear area for personal items is often more useful than another decorative object.
Before you buy, check the current product pages for size, ingredients, and availability. A comfortable guest sink is mostly a matter of clear space and clear choices.