<br>25mm classic size, versatile and not picky <br>Golden ratio design: 25mm diameter (about the size of a dollar coin), suitable for shirt collars, suit lapels, knitted cardigans or dresses waist, easy to enhance the sophistication of the look.<br>Antique bronze texture: Made of German imported environmentally friendly alloy, plated with antique bronze treatment, the surface shows a matte frosted texture, revealing the cold charm of industrial retro in a low-profile.<br>Anti-scratch and wear-resistant coating: the outer layer is covered with a nano-scale protective film, resisting daily friction and oxidation, and remaining as good as new after a long time of wear.<br><br>German Mechanical Elements, Tribute to Bauhaus Aesthetics <br>Gear Skeletonization: The main body incorporates industrial symbols such as precision gears and screws, with hard and symmetrical lines, echoing the German design philosophy of form follows function.<br>Enameled embellishments: the gears are filled with a deep blue enamel, contrasting with the bronze color to add a sense of artistic hierarchy.<br>Rotatable decorative ring: some models have a 360 rotatable micro-gear assembly embedded in the center, showing the beauty of mechanical dynamics in a fun and interactive way.<br><br>Double-insurance pin structure, stable and non-injurious <br>German locking system: Innovative use of spring pin + safety button double-insurance design, hidden pin shrinkage, to avoid scratching the fabric, thick tweed jackets, silk shirts can be worn with peace of mind.<br>Ergonomic curvature: the back of the pin fits the curve of clothing, reducing the feeling of bulge, long wearing without pressure marks, suitable for attending meetings or activities for a long time.<br>Lightweight design: the overall weight is only 7.5g, lightweight and comfortable for people with sensitive skin.