Charak Samhita
विदध्यादुत्तरं बस्तिं यथास्वौषधसंस्कृतम् । पुष्पनेत्रप्रमाणं तु प्रमदानां दशाङ्गुलम्॥६५॥
menorrhagia-metrorrhagia conditions, retention of urine and dribbling incontinence. [Dimensions of nozzle for uttara basti and its procedure] The uttarabasti nozzle for females should be 10 angulas in length, circumference as equal to that of urethra and its inner lumen permitting a seed of mudga (whole green gram/ phaseolus mungo).
english translation
vidadhyAduttaraM bastiM yathAsvauSadhasaMskRtam । puSpanetrapramANaM tu pramadAnAM dazAGgulam॥65॥
hk transliteration by Sanscript