Saizi dzakajairwa dzepombi dzesimbi isina ngura (SS) dzinosiyana zvichienderana nezvinodiwa nenyika dzakasiyana nemaindasitiri. Zvisinei, mamwe saizi dzakajairwa dzepombi dzesimbi isina ngura dzinosanganisira:- 1/8″ (3.175mm) OD kusvika 12″ (304.8mm) OD- 0.035″ (0.889mm) ukobvu hwemadziro kusvika 2″ (50.8mm) ukobvu hwemadziro – Hurefu hwakajairwa hunowanzova 20 feet (6.096 m) kusvika 24 feet (7.315 m) Zvakakosha kuziva kuti saizi idzi ingori mimwe mienzaniso yehukuru hwepombi dzesimbi isina ngura dzinoshandiswa, uye maindasitiri akasiyana kana vatengesi vanogona kupa saizi dzakasiyana kana dzakagadzirwa zvichienderana nezvinodiwa chaizvo.