All dimensions are taken from the widest point on the outside base of the bed. If you are ordering a bed  with sides such as a sofa bed or slumber bed the interior of the bed will be slightly less than the measurements because of the significantly padded base and sides.

If replacing an existing bed we would recommend you turn it upside down and measure it at it's widest point and select your size by the guide below allowing additional room for the padding.

If a listing features breed size, this is a guide only. Each dog prefers a different style bed with some preferring a snug cosy fit and others enjoying a bigger bed that allows them to stretch out. Please consider this when selecting your size and measure as suggested above.