Membrane buttons are men's jewelry, with a selection ranging from simple, beautiful silk knots to mechanical works of art made from clockwork and everything in between.
The function of membrane buttons is to close the mouth of the sleeve, i.e. cuff. Earlier, I wrote about the buttons on the cuffs of the jacket, which explained the original reason: when you started working, you had to roll up the sleeves. For the same reason, the mouths of the sleeves were designed to be rolled up. However, instead of buttons, cufflinks began to be used among gentlemen. Kalvosinnappi is in itself a bad word rooted in the Finnish language, because it is not actually a button. I think the English "cuff link" is better.
Membrane buttons have a small taste of luxury and it is one of the most common gifts that are easy to give a man, because it is not too personal like a necklace or a ring. In addition, you can give a tie pin from the same series or, for example, a bow with the cufflinks.
When choosing membrane buttons, you should think about what kind of shirt it will be put on. About 80% of the shirts to be bought are white and blue, so let it serve as a small introduction for the gift giver. For example, a rosewood, red-hued cufflink goes well with a blue shirt. For formal occasions, black cufflinks are always a safe choice. When choosing membrane buttons, you should avoid cheap trinkets, which may peel off the color, which can ruin an expensive shirt. In addition, the trinket may cause allergic symptoms to the wearer.
The shirts sold today mainly only have a button fastening at the mouth of the sleeve. Fortunately, however, many shirt manufacturers have woken up to the joy of us cufflink users to add grommets to cufflinks as well. In this case, the shirt has a grommet between the buttons on the sleeve mouth, see picture below. In a genuine cufflink shirt, regular buttons are not needed at all.