Shriya has a current refrigerator with a volume of 20 cubic feet and a space available for a new refrigerator of 26 cubic feet. To ensure that the new refrigerator fits well, she should consider sizes that are less than or equal to the available space of 26 cubic feet.
She may want to consider refrigerators that range from slightly smaller than her current model (for example, around 18 cubic feet or so) to up to 26 cubic feet. This would provide her with flexibility in options, allowing her to choose a refrigerator that meets her needs for storage capacity while ensuring it fits in the designated space.
In summary, Shriya should consider refrigerators between 18 ft³ and 26 ft³ in size.