Daidaitaccen girman bututun bakin karfe (SS) sun bambanta bisa ga ƙayyadaddun ƙa'idodi waɗanda ƙasashe da masana'antu daban-daban ke bi.Duk da haka, wasu na kowa misali masu girma dabam ga bakin karfe bututu sun hada da: - 1/8" (3.175mm) OD zuwa 12" (304.8mm) OD- 0.035" (0.889mm) bango kauri zuwa 2" (50.8mm) bango kauri - Standard tsawon ne yawanci 206 ƙafa (6.3 m) zuwa 20 m ƙafa (6.3 m). waɗannan girman wasu misalai ne na girman bututun bakin karfe da aka saba amfani da su, kuma masana'antu daban-daban ko masu kaya na iya samar da masu girma dabam ko na al'ada bisa ga takamaiman buƙatu.