Painting a miniature tartan pattern isn't as much as skill as it is about patience (although, to make it look as perfect as nail artist Mei Kawajiri here, having excellent artistic skills is necessary). To create all of the different lines is quite time consuming, as you have to wait for each colour to fully dry to move onto the next. For this exact look, start with the gold base coat and let it set before painting thin red horizontal lines down your nails. Once the red lines have dried, add a thicker vertical line of sheer sparkly black along the left side of each nail. Again, let those lines fully dry before adding very slim white lines (using a striping brush) over the black polish. Then, finish with a thicker vertical berry-coloured stripe along the right side of your nails (you could also just use the red again). For this exact look, Mei used shades from OPI's Shine So Bright collection including This Gold Sleighs Me, Red-y For the Holidays, Heart and Coal, Naught or Ice?, and Merry in Cranberry.