Cov xim ntawm lub tsheb xim nrog lub tsheb qauv, xim, qee qhov chaw (ru tsev, qhov rooj, qhov hood ntawm qhov sib txawv) muaj feem xyuam, qhov nruab nrab ntawm qhov xim nruab nrab yog nruab nrab ntawm 90-150um. Tam sim no muaj ntau lub tuam txhab tsim xim tha xim, los ntawm cov xim pleev xim rau dej xim, ua rau lub cev zoo nkauj thiab hnyav.
Peb yuav tsum to taub hais tias tsis yog cov thicker qhov zoo dua cov xim, ntau hom, txawv qauv ntawm tib qhov chaw, lub thickness ntawm cov xim yog txawv.
