The Vista and Grand Studios will easily accommodate smaller spas. The interior measures 911in x 911in. However, 6in in depth is lost because of the recessed entry. We suggest that the spa be placed 4in to 6in away from the rear wall to allow for the operation of an upright style cover lifter (recommended), or space to store the cover if no lifter assistance is used. Cover lifters that store the cover behind the spa are NOT recommended because they often require up to 20in behind the spa for operation. A properly placed spa with a front-to-back measurement of 75in should give you approximately 3 in front of the spa.