Size information: each rubber residue eraser is approx. 2.8 x 2 x 0.32 inch/ 7 x 5 x 0.8 cm and art ruling pen is approx. 4.7 inch/ 12 cm, 4.9 inch/ 12.5 cm, 5.25 inch/ 13.3 cm in length, different sizes to meet your different demandsFunctional : the adhesive remove eraser can remove adhesives and residues from paper, plastic and more surfaces, practical for school, home and office using, help you to clean watercolor, sketch, glass, plastic, leather, boards and so on; Ruling pens are a traditionally designed instrument lines in ink, paint or any liquid medium has the viscosity to Durable material: the artist masking fluid pen features a hardened plated steel nib with a green plastic handle, which can be applied to draw lines with paint, ink or masking fluid; The residue eraser is made of rubber, safe and durable to use, they are elastic and won't easy to break after pressingConvenient to use: these ruling ink pens can easily adjust the width of various lines; Adhesive residue erasers can help you easily remove of the adhesive residueColour: yellowMaterial: metalPackage Contents:3 x Glue residue erasers3 x Art ruling pensOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.