An important question to consider before buying a kayak is where you'll be using it.
If you’re going to paddle on the sea and in the archipelago, it’s a good idea to have a slightly longer kayak, preferably at least 4.5 metres. This makes it easier to paddle in headwinds and waves. Most kayaks will do the trick those who want to paddle in sheltered bays, waterways, or even lakes. It will depend on what you want to get out of your kayaking.
A shorter kayak is often wider and has a flat bottom, which gives you more stability in calm water, but becomes more unstable when out at sea.