As someone who's spent a lot of time working as a lash artist, I totally get the panic when you can't find the 10mm or 12mm lashes during a busy appointment. These lengths are like the workhorses of a lash set—they blend perfectly, look natural, and are versatile for many styles. I usually stock up in advance, but sometimes those sizes fly off the shelves faster than I expect. From experience, the 10mm lashes are super popular because they add just the right amount of length without being too dramatic, which appeals to most clients seeking a natural yet enhanced look. The 12mm ones are a go-to for a slightly more glamorous finish. However, the high demand often means running low quickly, especially during peak seasons or when clients request similar styles. To manage this, I recommend keeping an inventory log and ordering lashes as soon as the stock dips below a certain threshold. Some lash artists even swap with colleagues to avoid last-minute shortages. Also, consider having alternative lengths ready just in case, so you can adjust the design without compromising the look. At the end of the day, it’s all part of the lash artist hustle—and a little humor helps! Sharing funny moments like scrambling to find those key lash lengths during a client chat makes the job even more enjoyable and relatable within the lash community.