Choose towels by use rather than matching every piece
Bath towels, hand towels and kitchen towels do different jobs. Build a collection around those jobs before deciding whether every piece should match.

Count the towels that are actually in use on a normal day. There may be one by the kitchen sink, two in a shared bathroom and a larger towel drying behind a bedroom door. That small inventory tells you more than a display of coordinated sets. Buying an equal number of every size can leave a crowded linen shelf while the most useful pieces are always in the wash.
Start with where each towel hangs
A generously sized bath sheet may feel appealing but drag against a heater or bunch on a short rail. Measure the hanging space and consider how much fabric can spread out there. A towel that stays folded into a thick, damp bundle is less convenient than a smaller one that can be hung properly. Check the care label for laundering and drying instructions rather than judging maintenance by thickness alone.
Hand towels need a different assessment. If several people use one sink, keeping a few easy-to-change towels nearby may be more useful than choosing an especially large decorative towel. At the kitchen sink, separate the towels used for drying dishes from those used for hands or cleaning spills. Color can help distinguish their jobs without requiring labels.
Feel the edges and hanging loop if shopping in person. A stiff decorative border occupies space that does not absorb much, and a tiny loop may not work on the hook you own. Online, look for dimensions and close photographs of the weave. A towel pictured over a ladder can appear larger and thicker than it is when folded on a crowded rail.
Let the laundry rhythm set the quantity
Choose enough to cover ordinary use while another batch is being washed and dried. That number depends on the household's habits and available storage; it is not a reason to buy a large bundle automatically. Keep the spare stack within easy reach so replacing a towel does not require unpacking the whole cupboard.
Matching everything is optional. A repeated color in one bathroom can look calm, while a separate kitchen color makes sorting easier. If you do choose one shade throughout, pay attention to the actual dimensions when folding, since similarly colored hand and kitchen towels can disappear into the wrong pile. The collection should help with everyday tasks before it succeeds as a coordinated photograph.