Standard rectangular placemats measure 12 by 18 inches, while round placemats are typically 15 inches in diameter. Oval placemats range from 12 by 18 to 14 by 20 inches. This guide covers all placemat shapes and table runner dimensions for proper table settings.
Standard Placemat Dimensions by Shape
Placemats are measured by width and length for rectangular shapes, or diameter for round placemats. Size affects table coverage and setting capacity.
Placemat Shape
Dimensions (inches / cm)
Coverage Area
Best For
Standard Rectangular
12 x 18 / 30 x 46 cm
216 square inches
Everyday dining, most common size
Large Rectangular
14 x 20 / 36 x 51 cm
280 square inches
Formal dining, larger place settings
Small Rectangular
12 x 16 / 30 x 41 cm
192 square inches
Compact tables, children's settings
Round Placemat
15 diameter / 38 cm
177 square inches
Round tables, casual dining
Large Round
16 to 17 diameter / 41 to 43 cm
201 to 227 square inches
Formal settings, decorative
Oval Placemat
13 x 19 / 33 x 48 cm
193 square inches
Oval tables, elegant presentation
Charger Underplate
13 to 14 diameter / 33 to 36 cm
133 to 154 square inches
Layered under dinner plate
Table Runner Dimensions
Table runners complement placemats or stand alone. Standard widths range from 12 to 16 inches with variable lengths based on table size.
Runner Type
Width x Length
Table Size
Short Runner
12 to 14 x 36 to 48 inches
Small tables, accent piece
Medium Runner
14 x 72 inches
6 foot dining table
Long Runner
14 x 90 to 108 inches
8 to 10 foot banquet tables
Extra Long Runner
14 to 16 x 120 inches
12 foot conference or dining tables
Narrow Runner
10 to 12 x 72 inches
Sideboard or console accent
Placemat Spacing and Table Capacity
Proper spacing between placemats ensures comfortable dining. Standard recommendations based on table width and shape.
Table Width
Placemat Arrangement
Spacing Guidelines
36 inches wide
Two placemats across
6 inches from edge, 6 inches between
42 to 48 inches wide
Two placemats comfortably
12 inches from edge, centered
30 inch round table
Two to three round placemats
Evenly spaced around perimeter
48 inch round table
Four to six placemats
24 inches between settings
60 inch round table
Six to eight placemats
20 to 24 inches per person
Visual Placemat Size Comparison
Comparison of rectangular, round, and oval placemat dimensions.
Placemat Size Calculator
Determine the right placemat size and quantity for your table.
How to size placemats
Measure the surface, then the overhang
Standard placemats are 14″×19″ rectangular or 15″ round. Each diner needs about 24″ of table width; a 60″ rectangular table fits four placemats with 4″ gaps between them.
Standard sizes vs. your actual surface
Manufactured "standard" sizes assume textbook measurements. Older homes, custom furniture, and non-standard windows often deviate by 1–3″. If the measurement falls between two stock sizes, choose the larger; it's easier to hem or tuck excess fabric than to add length you don't have.
Mounting and clearance
Round mats look best on round tables; rectangular mats look best on rectangular ones. Mixing shapes works only when the table is large enough to leave clear space between settings.
Common mistakes
Measuring once. Surfaces are rarely perfectly square; take the smallest of three measurements.
Forgetting shrinkage. Cotton items can lose 3–5% on the first wash.
Ignoring drape. Heavier fabrics need an extra inch or two to hang correctly.