There is no set size for a stoma - there are some tiny ones and there are some huge ones. Obviously, colostomy stomas are usually bigger than ileostomy stomas, simply because in colostomies, the stoma is made from the large intestine whereas in an ileostomy, the stoma is made from the small intestine.
Because your surgery is new, your stoma is probably still swollen quite a bit. The good news is that your stoma will probably continue to shrink a bit over the next few weeks until it reaches it's ultimate size so remember to measure it each time you change so you can be sure you're cutting your wafer to the correct size. In your wafer pack, you will probably see a measuring guide. You'll notice it has many difference sizes on it - simply because stomas come in many different shapes and sizes.
A stoma that protrudes at least an inch is good - you really don't want it any shorter than that. With that length, hopefully, the stool comes out of the stoma and into the bag rather than the stoma pushing the stool out under the wafer.
Most people do tend to have a slight bulge on the side of their stoma for some reason. As long as it's not hurting or a reddish colour (both of which could indicate a hernia), it's perfectly normal.
Regarding the leakages, there are several things you can try. First of all, visit the various manufacturer's websites and ask for as many free samples as you can - there may be one that sticks to your skin better than the one you're currently using. I'll list the websites at the end of this message.
Secondly, maybe invest in an ostomy belt. A lot of people swear by them and love the security it gives them.
Thirdly, seek the advice of your stoma nurse if you have one. He/she will be able to give you some hints and make sure you're doing everything correctly.
Also, if you're using paste, remember, it's not an adhesive as the names suggests. It won't help the wafer stick any better. It's more a caulking agent designed to fill in any gaps between the skin, stoma and wafer.
The main manufacturer's websites are as follows:
There are some others too, just Google them to find them.
Good luck and I hope this helps.
I have had an ileostomy for 31 years now due to UC.
Moderator of the Ostomy Forum
I'm not a complete idiot - some parts of me are missing!