90 retaining wall blocks look like a large pile about the size of a pickup truck bed, heaped. Each block is 16.1 in (41 cm) long, 5.91 in (15 cm) tall, and weighs 55.1 lb (25 kg).

Together they weigh
2.48 US tons
2.48 US tons (2.25 tonnes)
about the size of a pickup truck bed, heaped
Size and weight estimated by AI from typical values. Sizes and weights are typical for an adult or standard retaining wall block; real ones vary.