This is a set of after-market silver w/ red 4x4 decals made for a 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 Chevy Silverado or GMC Sierra(1500, 2500, 3500).  They're the same size as the OEM decals, 17" wide by 4.5" high.  These will work great as replacement decals.  They can withstand moderate pressure washing and are rated for 3 years without fading.