Stackable test blocks (size calibration model), standard size brick blocks.

Every time I get new filament, I always have to print a bunch of test models and keep color swatches. For a beginner like me, most tests are too professional and not very useful, but as someone taught to be thrifty since childhood, it's quite distressing to waste so much time and material. Therefore, I unified the size test models and color swatches, drawing inspiration from Lego bricks, and turned the test blocks into stackable basic brick blocks. These can be used for both testing and as building blocks, making them convenient for daily storage, reference, and color swatch comparison. Currently, there are 3 sizes of standard blocks: 8*2*1mm; 2*2*1mm; 2*1*0.5mm. In the circular holes of the first two sizes, different thicknesses are set for color swatch comparison, which can be used as a reference against light. The color swatch thickness for the 1/4 circle in the square is 0.2, 0.4, 0.6, 0.8mm; the color swatch thickness for the 1/2 circles in the three rectangular holes is: 0.2, 0.4, 0.6, 0.8, 1, 1.2mm. Everyone can compare them themselves.