The lace decides whether it passes
Not the length, not the price. HD or transparent lace is thin enough to take a tint and sit down against your skin; the older beige lace announces itself in daylight and in photos. Every listing here states its lace type, because it is the single spec most likely to decide whether you wear the thing twice.
Then check density. 150–180% looks like most people's own hair. 200% and up is deliberately big — beautiful, but it does not read as natural, and nobody tells you that before you buy.