These two are bespoke log stores, made to fit under a window; there is no extra charge to reduce the height or length a few cm's as long as the depth remains the same. For a shelf add £25. The first one has straight side bars, the second curved.
Below is another bespoke in the same length but few inches lower, and was made using cedar wood; the cost for this size wood store in cedar is around £800. This one has straight side bars.