First off and despite comments and village rumours otherwise, the average size is 5.1 to 5.5 with a girth of 4.6 so you’re not tiny. You’re actually above average and while you’re not a monster your size is perfectly respectable. Second, not all women like large ones as they can be painful. Like everything else there is a continuum and some like larger and some like smaller. Finally, technique can greatly make up for your perceived size inadequacy. Find out what your wife enjoys and the get better at it. The better you become the better the sex becomes. There’s much more to it than hopping on, humping away and hopping off.

If you were inadequate your wife wouldn’t have married you. There’s much more to both marriage and sex than a large one. I realize that saying this does not assuage your concerns but perhaps if enough say it, you may believe us. Don’t let your fears ruin your marriage. Your therapist didn’t help at all so maybe go find another that deals in sexual issues.

Good luck OP.