A Lego brick is a small, interlocking plastic piece used in construction play. It typically features cylindrical studs on top and corresponding tubes on the bottom, allowing for easy stacking and connection with other bricks. The standard size of a Lego brick is 8mm high and 9.6mm wide, making it versatile for various building projects. Lego bricks come in many colors and shapes, enabling creativity and imagination in building. They are part of the larger Lego system, which includes themed sets, figures, and accessories. Since their introduction in the 1950s, Lego bricks have become popular worldwide, appealing to both children and adults.