Sizing in warm-weather clothing is more forgiving than in outerwear, but two traps recur. Linen shirts are often cut with a generous body and a narrow shoulder, so use shoulder width as your reference rather than chest. Shorts run short in the rise, which reads fine at 170cm and awkward above 185cm, so check the stated rise in centimetres, not the waist. Dresses cut to a 165cm fit model will sit noticeably higher on taller frames, so read the listed body length and add the difference to your own height maths.
Because everything here is light, this is the ideal category for building an efficient parcel. Add the things that weigh nothing and always get forgotten (socks, a cap, sunglasses, a swim short), since they ride along essentially free once the parcel is already moving. If you are also buying anything heavy, put it in the same shipment rather than a separate one: freight is per kilogram with a fixed handling charge on top, so splitting a heavy item into its own parcel simply pays the handling fee twice. Most agents hold goods free for 45 to 180 days, so ordering warm-weather pieces in early spring and shipping once is perfectly practical.
Spend more on linen and on anything unlined that sits against skin, where fibre quality is the whole experience. Spend as little as you like on mesh layers, graphic tees and swim shorts, which are close to commodity at any price. The honest caveat: light-coloured summer fabrics are the hardest thing in the catalogue to judge from photos, both for colour and for transparency. If you are buying white linen, plan on wearing something under it, and look at the community photos before you decide.