There's#paint roller sleeves and there's paint roller sleeves.

Do the chemists a favour and try match the right roller sleeve to their paint.

These are mini rollers. The black foam one, the red crushed pile one and the polar bear on the end are 4.5" only, as far as I'm aware.

There are 9" versions of the others and a couple in 14" and 18" too.

If you are painting walls and ceilings, use a mini and a matching larger roller sleeve together. Not only does painting speed go up a level, but the quality of finish too. That's nirvana.

Yet despite these products being around for so long, if you check the paintwork on walls, they are probably rolled to varying degrees of good. But around most door frames, you still see brush marks where the painter didn't use a matching pile mini roller to get right up close to the frame.

Does that aesthetic detail matter in the scheme of things? I'd argue it is quicker for the painter -

- one pass around the frame with a brush, a straight cut but not too concerned about it laying down perfectly

- pass the mini roller over the brush marks to remove the tramlines AND create a 4.5" band of paint around the frame.

- no holds barred now to use a matching 9 or 14" sleeve to roll out the main wall without any concern for getting too close to frames

so yeah, if you value time by money, which is the whole point of #bitcoin as money, it locks in the value of the one thing we don't have much of, time, this little detail is well worth aspiring for.