Well, there’s one in the title already.
There are plenty of boastful slang words for being well-hung and probably more insults for being tiny. But there needs to be a library of gentle euphemisms with which those who are “conservativley endowed” can describe themselves. A man should be able to quell disappointment and high hopes from a new partner by warning her about his “discreet package” without sounding crass and self-hating. So I came up with a few terms:
easy to manage