This RV Cover fits Class B Recreational Vehicles (Pop-Top Conversion Vans) with the following dimensions:
RVB-S - 234" L x 84" W x 96" H - Class B
RVB-M - 246" L x 84" W x 96" H - Class B
RVB-L - 260" L x 84" W x 96" H - Class B
RVB-SL - 261" L x 74" W x 74" H - Class B
To determine which size you need, please measure the complete length from the front bumper straight back to the rear of the RV. Be sure to include any spare tires or ladders in this measurement. For complete height measure from the base of the RV to the top of the roof (exclude all AC units, vents, satellites, etc).