the square represents 1.0 k-displacing Project 21631 (so called Buyan-M with eight so called Kalibrs: if you want to nitpick or don't know what I talk about, please skip reading this); 8 tubes in total
the circle symbol represents 2.5 k-displacing Project 20385 (8 Kalibrs, 16 cells of so called Redut: again, don't nitpick!); 24 tubes in total
the upward-pointing triangle symbol represents 3.6 k-displacing Incheon-II (8 Korean AShMs, 16 cells Korean VLS); 24 tubes in total
the downward-pointing triangle symbol represents 4.0 k-displacing Project 11356 (8 Kalibrs, 24 cells of so called Shtil: again, don't nitpick!); 32 tubes in total
the diamond symbol represents 4.1 k-displacing Type 054A (32 cells VLS; 8xC-803); 40 tubes in total
the left-pointing triangle symbol represents 5.4 k-displacing Project 22350 (16 Kalibrs, 32 cells of Redut: don't start nitpicking here); 48 tubes in total
the right-pointing triangle symbol represents 5.5 k-displacing KDX-II (32 cells of Mk 41 VLS, 32 cells of Korean VLS, 8 Korean AShMs); 72 tubes in total
the hexagon symbol represents 7.5 k-displacing Type 052D (64 cells VLS); 64 tubes in total
the star symbols represents 11.0 k-displacing KDX-III (80 cells of Mk 41 VLS, 32 cells of Korean VLS, 16 Korean AShMs); 144 tubes in total
and finally, the pentagon (sorry! LOL) symbol represents 12 k-displacing Type 055 with 112 cells VLS, 112 tubes in total
as you can see below, these ships MORE OR LESS follow the trend of ten tubes per one thousand metric tons of full displacement; they're WARSHIPS
