Your purchase notes
Keep the details in one place.
Check the material, filament diameter and spool dimensions before comparing colour or pack price.
Use the printer’s supported diameter and material guidance. PLA, ABS and other polymers need their own settings; keep material mass separate from the weight of spool and packaging.
Compare the cost per unit
Choose one consistent unit: pieces, kilograms, litres or prepared litres, as appropriate. Divide total cost by the quantity. Do not compare unlike product types on price alone.