Apple iPod Nano 4th Generation Crystal Case with Clip - Overstock - 3541993
Best Buy: Griffin Technology iClear Case for 4th-Generation Apple® iPod® nano Clear 10030-NCLRBA
OtterBox 4th gen. iPod Nano Armor case
Running Camel New For iPod Nano 7 7G 7th Belt Clip TPU Rubber Gel Soft Skin Case Cover + 2pcs Screen Protective Films For Nano 7|case cover|belt cliprubber case - AliExpress
iPod nano (4G) Skin - Solid State Yellow by Solid Colors | DecalGirl