Do it Best branded paint formula labels compatible with the leading color matching systems including Corob, Datacolor, Fluid Management, HERO, MatchRite and more. Compatible with Seiko SLP 650 snd Dymo 400 series LabelWriter printers. These are not compatible with the Dymo 5XL, 550 and 550XL series printers. 2.125 In. x 2.75 In.