Table 2.

Net mesh sizes used for sampling microplastics in the studies analyzed in the present review. Different net mesh sizes can be used during the same research. To simplify the table, references are here indicated with a number and the corresponding complete list is presented in the Online Resource 1

Net mesh size (μm)	Number of research studies	References [Online Resource 1]
20	1	[38]
50	3	[33], [36], [56]
64	1	[25]
80	2	[7,47]
90	1	[30]
100	1	[63]
120	1	[10]
135	1	[67]
150	2	[6,11]
180	1	[27]
200	9	[2], [4], [13], [14], [25], [31], [32], [53], [59]
280	1	[27]
300	8	[1], [22], [23], [28], [29], [31], [41], [63]
308	1	[48]
330	7	[4], [24], [36], [49], [55], [56], [65]
333	12	[8], [9], [15], [32], [43], [44], [51], [54], [61], [68], [69], [72]
335	5	[5], [22], [26], [27], [51]
350	3	[34], [35], [52]
355	1	[39]
400	1	[31]
450	1	[47]
500	5	[13], [17], [31], [60], [63]
1000	1	[63]
5000	1	[63]