How should I interpret the 1-2cm margin of error listed in the size chart when choosing between 0 and 1?

Let's first compare the numbers side by side. For the Curved Capri Pants in black, the hip measurement is 50.8 for size 0 and 52.3 for size 1^[1]. For the sheer cropped knit in blue, the shoulder measurement is 33 for 0 and 34 for 1, meaning the number shifts only slightly even when choosing one size up^[2]. On the other hand, the waist of the REVERSIBLE SHEER STRAIGHT FIT PANTS widens quite noticeably from 34.3 to 36.5^[3].

Along with the size chart, AMOMENTO states that an error of 1-2cm may occur depending on the measuring location and fabric elasticity^[4]. For stretchable materials like knits, values vary depending on how much they are pulled while being measured, and deviations tend to be larger for areas like shoulder seams or hips where defining the start and end points is subjective.

Therefore, when weighing between two sizes, it is better to use items with a clear difference as the pivot of your decision rather than relying on an item with a narrow gap. You can establish a benchmark by laying a garment you currently wear well flat on the floor, measuring the same parts, and comparing them with the values in the chart. The standard order is to look first at areas that are difficult to adjust once worn, such as the shoulders or waist, and leave the length for later.

hmmm, the margin of error notice is less of a phrase meant to make you distrust the chart and more of a sign asking you not to use a single-digit difference as the final basis for your size decision.