Ideal for Compact System Cameras and Fixed Zoom distinct side pockets for cables, batteries, or lens caps; a shoulder strap should be included; SD card pocket inside Internal measurements (LxWxH): 6" x 3.1" x 4" External measurements (LxWxH): 6.7" x 3.4" x 6.3" SLR cameras, including the T3i and D3100, will not fit in this bag.