Yours was either made by Kastrup Glas if it was made between c.1950 - 1965, or by Kastrup-Holmegaard if made post-1965. There's no way to tell without an original factory label, sadly. The colour is Oceanblue - originally a Kastrup colour.
Standard production models came in 5 sizes: 12" / 300mm, 10" / 250mm, 9" / 225mm, 7.75" / 190mm, and 5.75" / 140mm. There were some properly miniature models made as production samples and given out by travelling reps - these were 4.33" / 110mm, and were always signed 'Holmegaard' to the base.