Need help about particular size problems

[Huy250580372djv]

 I practice with the particular but i have a problem about size particular always slammer than layer mask. how can i solve that?

p/s: sorry about my bad english

[Rick Gerard]

Particular is way too complicated to figure out by just poking around in the UI. Spend some time on the Maxon site and watch a few Particular Tutorials. The time spent there will save you hours of fiddling. There are also 59 tutorials on the Cineuniversty website. Search "Particular" on the home page. Those tutorials are much better than most of them you will find by searching YouTube.