Peb cov khoom ua si qhov ntau thiab tsawg ntawm cov duab me me (2.5-3.5 cm), zoo meej rau cov khoom ua si capsule thiab lub qhov muag tsis pom kev, mus rau Cov Khoom Ua Si Loj (10-30 cm), zoo tagnrho rau cov khoom muag muag muag. Peb kuj muab Cov Khoom Ua Si Nruab Nrab (3.5-5.5 cm) thiab Cov Khoom Ua Si Loj Loj (5.5-10 cm) kom haum rau ntau yam kev xav tau. Txawm hais tias koj xav tau cov khoom lag luam me me lossis cov khoom sib sau loj dua, peb muab tag nrho cov kev hloov kho kom ntseeg tau tias qhov loj me zoo phim koj cov kev xav tau.