use a smaller nozzle diameter. adhesion to the print bed can be an issue so as @CuriousAardvark says, you may want to explore the use of a brim. We had to do this recently when printing out a molex seal, just couldn't get it to stick otherwise. We used ColorFabb nGen Flex for this. ( https://www.idig3dprinting.co.uk/new...abb-ngen-flex/ ).

The problems come if you need good definition. Printing lots of detail on a small model is obviously harder than just printing a small cube.