You've probably seen those wire chair contraptions that look like slingshots. They function as chairs, but that doesn't mean you'd willingly spend time in one if you had any other choice. One problem is size. Some patio chairs are just too narrow and skimpy. Others are built so low to the ground that getting out of them can be downright embarrassing -- especially for older folks. Sizing for loveseats and couches can be tricky, too. Some are pretty deep from front to back, which can make them uncomfortable to sit in for any length of time. When shopping for outdoor furniture, sit down and relax -- literally. Test the pieces you have in mind. Think comfort and buy accordingly.