Each person needs a minimum of around 24 inches (61cm) to eat comfortably, although some tables and chair designs can allow more people to squeeze in when required. However, for a comfortable table surface, consider up to 28–30 inches (71–76cm) for more elbow room, especially if you have chairs with armrests or wide seats. In rectangular tables, you also need to calculate an extra 12 inches (30cm) for each end if you want to place seating at the head and foot of the table.
Round dining table size for six
You will need at least 48 to 60 inches in diameter (4–5ft; 122–152cm) to seat six at a round table, working best with a pedestal base. It is possible to create a tight 6-seater round dining table with a diameter of 44–54 inches, but aiming for 54–60 inches is a more comfortable fit and may even squeeze in eight.
The minimum round dining table size for six calculates to around 55 inches (140cm), although an ideal size would be 72 inches (6ft; 183cm). From about 60 inches (5ft; 152cm), you can start to squeeze in around seven to eight people, and with a minimal table design a 6-foot table could squeeze up to eight or nine when required.

Therefore, Alva metal base would your best choice if you consider a round table.
Square dining table size for six
You will need at least 48 to 60 inches in diameter (4–5ft; 122–152cm) to squeeze in six at a square table (see table measurements for four and eight-seater tables).

Akro Metal Legs would enhance your square wood top table to a new level and can absolutely brighten up your living space
Rectangular dining table size for six
It is possible to squeeze six people around a table measuring from 60–72 inches long (5–6ft) and 31–36 inches wide (152cm–183cm x 79–91cm).

Uzar Metal Legs & bench legs could easily reach out your expectation.
To fit six without any diners at either end, the minimum dining table size for six would be 72 x 31 inches (6ft x 2’6″; 183 x 76cm). To calculate enough space for diners at the head and foot of the table, the minimum size 79 x 36 inches (6’6″ x 3ft; 198cm x 91cm), although to avoid any overlap in dining settings you would need at least 96 x 55 inches (8ft x 4’6″; 244 x 137cm).

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Are you looking for a new table to brighten up your space? Flowyline Design Furniture is the perfect place for you to find the best furniture legs! We design and manufacture metal table bases, side table legs, coffee table legs, and much more. Our artisans work tirelessly to make all the handmade table legs stand out and ensure that all your requirements are met.
If you want to customize the legs to suit your tabletop or your bench, we're ready to help you. Live chat with us at flowyline.com or leave your email for a 3D drawing.