Found on the Klystra site , same text for the two sizes ,
### copy from Klystra user memo ###
Only 2-4 pumps of air are needed for the bigger balloon and 3-5 pumps of air for the smaller balloon for proper use. If this is the first time using a double balloon nozzle start with only 1 or 2 pumps for the larger balloon and 2-3 for the smaller balloon. We only recommend using enough pumps to create a good seal as every person is different and some may need 1 or 2 more pumps than someone else.
This is a medical device that is not meant to be left in the body longer than you are retaining your enema. Only inflate after insertion and always deflate before removal.
### copy ###
If you like to be full filled with a balloon you can try this : using a bulb N°8 you fix on the nozzle a hose with glue,
when glued , you deflate the bulb squeezing it , and achieve by sucking thru the hoze,
when completely deflated clamp the hose, lube the bulb , fold and shove in your ass ,
once shoved open the clamp and blow some air thru the hoze , enjoy !
to slide it out , suck the air out from the hoze , put the clamp , and safely and slowly slide the bulb out .
Huge feels garanty BUT USE THE RIGHT AND GOOD GLUE