Comparison of NovoFine® Needles (4 mm vs. 6 mm)

Inclusion Criteria: * Children * Type 1 diabetes * Insulin treatment for more than ½ year * BMI lesser than or equal to 19 kg/m2 * Last HbA1c taken within the last year lesser than 10.5% * Girls: only prepubertal * Boys: both pre pubertal and pubertal. Adults * Type 1 and 2 diabetes * Insulin treatment for more than ½ year * BMI lesser than or equal to 23 kg/m2 * Last HbA1c taken within the last year lesser than 10.5% Exclusion Criteria: * Known or suspected allergy to trial product(s) or related products. * Pregnant, breast-feeding or the intention of becoming pregnant or not using adequate contraceptive measures (including country-specific adequate measures, if any). * Skin disease at abdomen and/or thigh