Tank sweaters are available in two sizes. 203 (tall skinny, 29.5 tall x 18.15” diameter. Fits tank sizes from 30”-52” tall x 14” x 18” diameter) 250 (short fat, 20” tall x 24.50” diameter. Fits tank sizes from 20”-29” tall x 19”-24” diameter). Download Tank Sweaters Brochure