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Table 1 Length and width/ diameter distribution for the used plastic shapes (fibers, films, foams and particles) and the respective polymers: PES = polyester, PP = polypropylene, PA = polyamide, PET = polyethylene terephthalate, CPP = casted polypropylene, PE = polyethylene, PU = polyurethane, EPP = expandable polypropylene, PC = polycarbonate

From: Microplastics have shape- and polymer-dependent effects on soil aggregation and organic matter loss – an experimental and meta-analytical approach

Shape Polymer   Length in mm Width/diameter in mm
   N mean sd mean sd
Fiber PES 100 0.899 0.736 0.030 0.004
PP 100 1.325 0.697 0.028 0.004
PA 100 1.248 0.794 0.030 0.006
Film CPP 100 5.378 1.913 4.018 1.579
PE 100 4.478 1.087 3.208 1.623
PET 100 5.086 0.833 4.289 1.469
Foam PU 100 2.858 2.203 1.691 0.975
PE 100 4.565 3.116 2.133 1.482
EPP 100 2.039 0.802
Particle PP 100 4.717 0.412 2.693 0.880
PC 100 2.065 1.183 1.157 0.642
PET 100 4.939 2.401 2.621 1.098