How do I choose the right S-M size, and what happens if the knee warmer fits too loosely or too tightly?

Size S-M is designed for a knee circumference of about 32 cm. Before buying, it is worth measuring the girth of the knee at its middle part, exactly where the knee warmer will sit, with a tape measure. It is better to measure standing, with the leg slightly bent, to get a more realistic result.

The fit matters directly for the function of the product:

• A knee warmer that is too loose will shift when you walk, let cold air under the material and retain heat less well, so the main purpose of the accessory is not fulfilled.
• A knee warmer that is too tight can press on the soft tissues, spoil comfort during long wear and cause unpleasant sensations, especially if your leg swells during the day.

The guideline is that the knee warmer should fit the knee snugly but without pressure: it should not slip down during movement and should not leave marked impressions on the skin after removal. If your knee circumference is at the edge of the size range, and you tend to swell or wear the knee warmer over thick clothing, it is better to choose a size with a little room to spare.

With sensitive skin or marked discomfort in the area of the joint, go by your own sensations and, if necessary, consult a specialist.