import IPython.core.display as widgets @jupyter-widgets/base code example

Example: how to fit the whole text beside checkbox in ipywidgets

from ipywidgets import widgets, Layout
from IPython.display import display

checkbox = widgets.Checkbox(value=False, disabled=False, layout=Layout(width='300px')) #just vary the Layout attribute according to your liking
box = widgets.HBox([checkbox, label])
display(box)