Snowglobe for you40003 Do It Yourself (DIY) Replacement Glass Dia 80mm

does this need to be attached to a base or can it stand without one?

Hi do you have smaller sizes? I am looking for a replacemnt globe with an opening diameter of around 25mm. Thank you

80mm is that the base?

Can anyone confirm what the base width is of this as I plan on using an existing base / insert?