Ditto the belt pouches under an un-tucked shirt. I have a single and double from GunMate that can be worn horizontal or vertical on a belt. They're nylon with Velcro closures. I carry none, one or two extra mags depending on where I expect to be/go. High risk areas deserve two mags for a total of 24 rounds for my 9mm Shield. (7+1, 8, 8)
Better to have and not need than to need and not have.
Thanks for all the comments and photos.....
I did find one single belt mag carrier I like..so for normal everyday activities I will carry it and be comfortable with just one spare.
I carry only for self defense so I think 14 rounds will accomodate that need, but if going to high risk area's will carry the double paddle rig until I can find another single one like this one.