It depends on the mold, but as a general rule, just over an inch. Much wider and I get complaints that they're too wide. People say they're uncomfortable to hold when they're new.
Between me and my husband, we have an embarrassing number of odds and ends in the shower. The Hubs has really been great about the soaping stuff. He'll test anything for me and give me an honest opinion, even the super girly soaps. My friend's husband is even worse. He has a bad back and loves to kick back in a hot bathtub, so he's my bubble bar and bath bomb tester. My friend walked in her bathroom one day to find him singing in the tub and surrounded by bubbles up to ears in a cloud of BB Fresh Snow. She just shook her head and walked back out again.
