About Different Block Sizes – Garden and Retaining Walls

First Published: 10 April 2024 | Updated: 24 April 2024

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Blocks have come a long way both with aesthetics and easy of use. They come in various shapes and sizes, each offering unique functional qualities for all types of garden and retaining walls. Whether you’re revamping your backyard garden or wanting to build your own retaining wall, achieving the desired look and functionality of your project is important.

Understanding Block Sizes

Block sizes typically vary to accommodate different applications and design preferences. From small garden edging, medium sized blocks for garden walls or large hollow blocks to fill for retaining walls or even to create tired gardens or seats. Let’s take a closer look at some popular choices:

200mm blocks

These blocks are easy to handle and lightweight, making it easy to create your own edging and garden wall.

250mm blocks

Benefits of 250mm blocks is that they are easy to work out how many you need for your walling (eg 4 blocks gives you a metre of walling).

solid blocks

Solid blocks are a strong option for garden walls and can be stacked on top of each other or in a stretcher bond format.

hollow core blocks / building a fence on a retaining wall

Hollow core blocks are used when core filling with aggregate is required where additional drainage is required or additional strength for wall height. These hollow blocks are also used when building a fence on top of a retaining wall – poles can be placed inside the block for the fencing.

interlocking / stacking blocks

Stackable or interlocking blocks are perfect for DIY projects. As these blocks have self locating interlocking lugs, makes stacking each block much easier to do.

economical blocks

Our economical blocks are the perfect block when you’re requiring an affordable block option or a walling that you will be painting or rendering. The grey blocks and grey easy lock blocks are easy to use and stack and with their smooth finish, make them perfect for painting or you can leave with their natural grey colour.

How to Choose the Right block for Your Project

You can use our easy to use Retaining Wall builder to her making choosing the right block for your project even easier!