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The breaking waves symbol with "The East is Red" inscription worked very well in an upright rectangular format and was widely reproduced in two fairly standard sizes.
h. 23mm w. 17mm 1.8g
h. 24mm w. 17mm 1.7g
h. 32mm w. 22mm 3.3g
h. 32mm w. 22mm 3.1g
h. 32mm w. 22mm 3.5g
h. 33mm w. 22mm 3.2g
h. 32mm w. 22mm 3.0g
h. 30mm w. 20mm 2.2g